electron/patches/chromium/feat_allow_disabling_blink_scheduler_throttling_per_renderview.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: deepak1556 <[email protected]>
Date: Fri, 29 Nov 2019 16:08:14 -0800
Subject: feat: allow disabling blink scheduler throttling per RenderView

This allows us to disable throttling for hidden windows.

diff --git a/content/browser/renderer_host/render_view_host_impl.cc b/content/browser/renderer_host/render_view_host_impl.cc
index 195b0f2da8a08f59566bb6306ccbec94b684d613..8d04d13574374a2cf2b09c2dd30b6b9f07b4ac84 100644
--- a/content/browser/renderer_host/render_view_host_impl.cc
+++ b/content/browser/renderer_host/render_view_host_impl.cc
@@ -433,6 +433,10 @@ void RenderViewHostImpl::SetBackgroundOpaque(bool opaque) {
   Send(new ViewMsg_SetBackgroundOpaque(GetRoutingID(), opaque));
 }
 
+void RenderViewHostImpl::SetSchedulerThrottling(bool allowed) {
+  Send(new ViewMsg_SetSchedulerThrottling(GetRoutingID(), allowed));
+}
+
 bool RenderViewHostImpl::IsMainFrameActive() {
   return is_active();
 }
diff --git a/content/browser/renderer_host/render_view_host_impl.h b/content/browser/renderer_host/render_view_host_impl.h
index 4311c3406cc8a3e2af505df182c890e4de6e5ea3..15daed8fd4071926c9fa7bf3aa00789b0dae0928 100644
--- a/content/browser/renderer_host/render_view_host_impl.h
+++ b/content/browser/renderer_host/render_view_host_impl.h
@@ -108,6 +108,7 @@ class CONTENT_EXPORT RenderViewHostImpl
   SiteInstanceImpl* GetSiteInstance() override;
   bool IsRenderViewLive() override;
   void NotifyMoveOrResizeStarted() override;
+  void SetSchedulerThrottling(bool allowed) override;
   WebPreferences GetWebkitPreferences() override;
   void UpdateWebkitPreferences(const WebPreferences& prefs) override;
   void OnWebkitPreferencesChanged() override;
diff --git a/content/common/view_messages.h b/content/common/view_messages.h
index accb317ce091177766a8c49054b3e274b57871d8..8e0c40cbb98e02849c4c9dffc714eb48fbb40d57 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -109,6 +109,9 @@ IPC_STRUCT_TRAITS_END()
 // Make the RenderWidget background transparent or opaque.
 IPC_MESSAGE_ROUTED1(ViewMsg_SetBackgroundOpaque, bool /* opaque */)
 
+// Whether to enable the Renderer scheduler background throttling.
+IPC_MESSAGE_ROUTED1(ViewMsg_SetSchedulerThrottling, bool /* allowed */)
+
 // This passes a set of webkit preferences down to the renderer.
 IPC_MESSAGE_ROUTED1(ViewMsg_UpdateWebPreferences,
                     content::WebPreferences)
diff --git a/content/public/browser/render_view_host.h b/content/public/browser/render_view_host.h
index 95679ab2915ad496ca0018aa13874b84eb11d7fd..c278e0fc072409677beafc7f252ebcf6002f16d4 100644
--- a/content/public/browser/render_view_host.h
+++ b/content/public/browser/render_view_host.h
@@ -99,6 +99,9 @@ class CONTENT_EXPORT RenderViewHost : public IPC::Sender {
   // started.
   virtual void NotifyMoveOrResizeStarted() = 0;
 
+  // Disable/Enable scheduler throttling.
+  virtual void SetSchedulerThrottling(bool allowed) = 0;
+
   // TODO(mustaq): Replace "Webkit" from the following three method names.
   //
   // Returns the current WebKit preferences. Note: WebPreferences is cached, so
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 37ac96bb7d42fe4caeb31861875219079d986982..d4b3d0f71ea6bc6aa9b927f32ee09eb9732c46c7 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1210,6 +1210,8 @@ bool RenderViewImpl::OnMessageReceived(const IPC::Message& message) {
   IPC_BEGIN_MESSAGE_MAP(RenderViewImpl, message)
     IPC_MESSAGE_HANDLER(ViewMsg_SetPageScale, OnSetPageScale)
     IPC_MESSAGE_HANDLER(ViewMsg_SetInitialFocus, OnSetInitialFocus)
+    IPC_MESSAGE_HANDLER(ViewMsg_SetSchedulerThrottling,
+                        OnSetSchedulerThrottling)
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateTargetURL_ACK, OnUpdateTargetURLAck)
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateWebPreferences, OnUpdateWebPreferences)
     IPC_MESSAGE_HANDLER(ViewMsg_ClosePage, OnClosePage)
@@ -1800,6 +1802,12 @@ void RenderViewImpl::OnSetPageScale(float page_scale_factor) {
   webview()->SetPageScaleFactor(page_scale_factor);
 }
 
+void RenderViewImpl::OnSetSchedulerThrottling(bool allowed) {
+  if (!webview())
+    return;
+  webview()->SetSchedulerThrottling(allowed);
+}
+
 void RenderViewImpl::ApplyPageVisibilityState(
     PageVisibilityState visibility_state,
     bool initial_setting) {
diff --git a/content/renderer/render_view_impl.h b/content/renderer/render_view_impl.h
index a6768059fb7e91115f4659f236f096d264977408..a5954b581e06f78d364f4525f1550f7f13c836ec 100644
--- a/content/renderer/render_view_impl.h
+++ b/content/renderer/render_view_impl.h
@@ -452,6 +452,7 @@ class CONTENT_EXPORT RenderViewImpl : public blink::WebViewClient,
   void OnSetInitialFocus(bool reverse);
   void OnSetRendererPrefs(
       const blink::mojom::RendererPreferences& renderer_prefs);
+  void OnSetSchedulerThrottling(bool allowed);
   void OnSuppressDialogsUntilSwapOut();
   void OnUpdateTargetURLAck();
   void OnUpdateWebPreferences(const WebPreferences& prefs);
diff --git a/third_party/blink/public/web/web_view.h b/third_party/blink/public/web/web_view.h
index dc04ef3eb3a1a56d932a22ffce7b71bb60786f7a..3e7d605d7a0f884299e441d954877c03436aa618 100644
--- a/third_party/blink/public/web/web_view.h
+++ b/third_party/blink/public/web/web_view.h
@@ -399,6 +399,7 @@ class WebView {
   // Scheduling -----------------------------------------------------------
 
   virtual PageScheduler* Scheduler() const = 0;
+  virtual void SetSchedulerThrottling(bool allowed) = 0;
 
   // Visibility -----------------------------------------------------------
 
diff --git a/third_party/blink/renderer/core/exported/web_view_impl.cc b/third_party/blink/renderer/core/exported/web_view_impl.cc
index 34ff617acbd75b2d431aef194cceff651aadc24f..b681d16f2bf1aa9151d455f1a6d9ebb55adeae7b 100644
--- a/third_party/blink/renderer/core/exported/web_view_impl.cc
+++ b/third_party/blink/renderer/core/exported/web_view_impl.cc
@@ -3326,12 +3326,20 @@ PageScheduler* WebViewImpl::Scheduler() const {
   return GetPage()->GetPageScheduler();
 }
 
+void WebViewImpl::SetSchedulerThrottling(bool allowed) {
+  DCHECK(GetPage());
+  scheduler_throttling_allowed_ = allowed;
+  GetPage()->GetPageScheduler()->SetPageVisible(allowed ?
+      (GetVisibilityState() == PageVisibilityState::kVisible) : true);
+}
+
 void WebViewImpl::SetVisibilityState(PageVisibilityState visibility_state,
                                      bool is_initial_state) {
   DCHECK(GetPage());
   GetPage()->SetVisibilityState(visibility_state, is_initial_state);
-  GetPage()->GetPageScheduler()->SetPageVisible(visibility_state ==
-                                                PageVisibilityState::kVisible);
+  GetPage()->GetPageScheduler()->SetPageVisible(
+      scheduler_throttling_allowed_ ?
+          (visibility_state == PageVisibilityState::kVisible) : true);
 }
 
 PageVisibilityState WebViewImpl::GetVisibilityState() {
diff --git a/third_party/blink/renderer/core/exported/web_view_impl.h b/third_party/blink/renderer/core/exported/web_view_impl.h
index 3154dbd08dc8aa0386c6259afdec084570822a9e..b9f6ed110e4527a9a05074c31cc89982edaae4f2 100644
--- a/third_party/blink/renderer/core/exported/web_view_impl.h
+++ b/third_party/blink/renderer/core/exported/web_view_impl.h
@@ -306,6 +306,7 @@ class CORE_EXPORT WebViewImpl final : public WebView,
   LocalDOMWindow* PagePopupWindow() const;
 
   PageScheduler* Scheduler() const override;
+  void SetSchedulerThrottling(bool allowed) override;
   void SetVisibilityState(PageVisibilityState visibility_state,
                           bool is_initial_state) override;
   PageVisibilityState GetVisibilityState() override;
@@ -680,6 +681,8 @@ class CORE_EXPORT WebViewImpl final : public WebView,
   // WebViewImpl::Close while handling an input event.
   bool debug_inside_input_handling_ = false;
 
+  bool scheduler_throttling_allowed_ = true;
+
   FloatSize elastic_overscroll_;
 
   Persistent<EventListener> popup_mouse_wheel_event_listener_;