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 9a2cc0f076406d68910eeb5351e3869287515fcb..bde2f593f55edc677d44f4ae037042fe10661679 100644
--- a/content/browser/renderer_host/render_view_host_impl.cc
+++ b/content/browser/renderer_host/render_view_host_impl.cc
@@ -512,6 +512,10 @@ void RenderViewHostImpl::SetBackgroundOpaque(bool opaque) {
   GetWidget()->GetAssociatedFrameWidget()->SetBackgroundOpaque(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 af15805b34d2cc038e73654017d4c0921e3fc321..3489f03bac1283efb6a27f5b959a72a8e5d0cb14 100644
--- a/content/browser/renderer_host/render_view_host_impl.h
+++ b/content/browser/renderer_host/render_view_host_impl.h
@@ -110,6 +110,7 @@ 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 19fa7ac26926231b01fe19f7adf62dd0e08edb1b..d4d3b97811a656d40884d7e4b872fdf72dfb11fa 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -94,6 +94,9 @@ IPC_STRUCT_TRAITS_END()
 
 // Messages sent from the browser to the renderer.
 
+// 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 dfd856eb481114fea9da3e26b4080c9a8473acf6..604a95a0427705eca523e91b08a136f806da68f0 100644
--- a/content/public/browser/render_view_host.h
+++ b/content/public/browser/render_view_host.h
@@ -96,6 +96,9 @@ 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 57447f4529917692155d1861c7658156978fa0be..2eaf980889ef9053e728dc09e76f1fcd889153b8 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1173,6 +1173,8 @@ bool RenderViewImpl::OnMessageReceived(const IPC::Message& message) {
 
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(RenderViewImpl, message)
+    IPC_MESSAGE_HANDLER(ViewMsg_SetSchedulerThrottling,
+                        OnSetSchedulerThrottling)
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateTargetURL_ACK, OnUpdateTargetURLAck)
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateWebPreferences, OnUpdateWebPreferences)
     IPC_MESSAGE_HANDLER(ViewMsg_MoveOrResizeStarted, OnMoveOrResizeStarted)
@@ -1669,6 +1671,12 @@ bool RenderViewImpl::GetContentStateImmediately() {
   return send_content_state_immediately_;
 }
 
+void RenderViewImpl::OnSetSchedulerThrottling(bool allowed) {
+  if (!GetWebView())
+    return;
+  GetWebView()->SetSchedulerThrottling(allowed);
+}
+
 void RenderViewImpl::OnUpdateWebPreferences(const WebPreferences& prefs) {
   webkit_preferences_ = prefs;
   ApplyWebPreferences(webkit_preferences_, GetWebView());
diff --git a/content/renderer/render_view_impl.h b/content/renderer/render_view_impl.h
index 79ffb7a4a0ecef7c2e0583ca06a42c7bf6146bcc..ccb6f98da708fba99579623d92f9e40607e94dda 100644
--- a/content/renderer/render_view_impl.h
+++ b/content/renderer/render_view_impl.h
@@ -391,6 +391,7 @@ class CONTENT_EXPORT RenderViewImpl : public blink::WebViewClient,
   void OnSetHistoryOffsetAndLength(int history_offset, int history_length);
   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 baa1cec07522a23221b146165a638d3f679f9817..50f0c46c8fcbb4ee8ebb316f859f84d02d93ceda 100644
--- a/third_party/blink/public/web/web_view.h
+++ b/third_party/blink/public/web/web_view.h
@@ -393,6 +393,7 @@ 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 94fb9863a6da4c049e45ec5966ef79d9c8e42b75..063d88779ad2ca7c4c723e2872c28d93401fcec3 100644
--- a/third_party/blink/renderer/core/exported/web_view_impl.cc
+++ b/third_party/blink/renderer/core/exported/web_view_impl.cc
@@ -3366,6 +3366,13 @@ PageScheduler* WebViewImpl::Scheduler() const {
   return GetPage()->GetPageScheduler();
 }
 
+void WebViewImpl::SetSchedulerThrottling(bool allowed) {
+  DCHECK(GetPage());
+  scheduler_throttling_allowed_ = allowed;
+  GetPage()->GetPageScheduler()->SetPageVisible(allowed ?
+      (GetVisibilityState() == mojom::blink::PageVisibilityState::kVisible) : true);
+}
+
 void WebViewImpl::SetVisibilityState(
     mojom::blink::PageVisibilityState visibility_state,
     bool is_initial_state) {
@@ -3376,7 +3383,8 @@ void WebViewImpl::SetVisibilityState(
   }
   GetPage()->SetVisibilityState(visibility_state, is_initial_state);
   GetPage()->GetPageScheduler()->SetPageVisible(
-      visibility_state == mojom::blink::PageVisibilityState::kVisible);
+      scheduler_throttling_allowed_ ?
+          (visibility_state ==mojom::blink::PageVisibilityState::kVisible) : true);
 }
 
 mojom::blink::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 e2124434e0d8ba3416179534ababca9d3b7f1708..3881e7a9f6fb25cbec37ddce6f87bf25b0d4a400 100644
--- a/third_party/blink/renderer/core/exported/web_view_impl.h
+++ b/third_party/blink/renderer/core/exported/web_view_impl.h
@@ -329,6 +329,7 @@ class CORE_EXPORT WebViewImpl final : public WebView,
   LocalDOMWindow* PagePopupWindow() const;
 
   PageScheduler* Scheduler() const override;
+  void SetSchedulerThrottling(bool allowed) override;
   void SetVisibilityState(mojom::blink::PageVisibilityState visibility_state,
                           bool is_initial_state) override;
   mojom::blink::PageVisibilityState GetVisibilityState() override;
@@ -681,6 +682,8 @@ 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_;
 
   // If true, we send IPC messages when |preferred_size_| changes.