build: lint patches for trailing whitespace (#26007)

patches/chromium/disable_color_correct_rendering.patch

@@ -81,7 +81,7 @@ index 5575c90cf05ec43bc787711f1d44b8dd58ead99c..a544d836159522751c1262370d8c1562
        !command_line->HasSwitch(switches::kUIDisablePartialSwap);
  #if defined(OS_APPLE)
 diff --git a/components/viz/service/display/gl_renderer.cc b/components/viz/service/display/gl_renderer.cc
-index 31fa3d22a28cb673a1eac983acafb7bcd484e6ca..58d52c207f12dd329a0cb8593af5f76ab5ba70f1 100644
+index 31fa3d22a28cb673a1eac983acafb7bcd484e6ca..e1bfab6b716fa5d2f552b7af149748b3b0dc0a23 100644
 --- a/components/viz/service/display/gl_renderer.cc
 +++ b/components/viz/service/display/gl_renderer.cc
 @@ -88,6 +88,9 @@
@@ -121,7 +121,7 @@ index 31fa3d22a28cb673a1eac983acafb7bcd484e6ca..58d52c207f12dd329a0cb8593af5f76a
                                         tint_gl_composited_content_,
                                         ShouldApplyRoundedCorner(quad)),
 -                CurrentRenderPassColorSpace(), CurrentRenderPassColorSpace());
-+                PATCH_CS(CurrentRenderPassColorSpace()), 
++                PATCH_CS(CurrentRenderPassColorSpace()),
 +                PATCH_CS(CurrentRenderPassColorSpace()));
  
    gfx::ColorSpace quad_color_space = gfx::ColorSpace::CreateSRGB();

patches/chromium/fix_patch_out_profile_refs_in_accessibility_ui.patch

@@ -7,7 +7,7 @@ This tweaks Chrome's Accessibility support at chrome://accessibility
 to make it usable from Electron by removing Profile references.
 
 diff --git a/chrome/browser/accessibility/accessibility_ui.cc b/chrome/browser/accessibility/accessibility_ui.cc
-index 42d79b5651e204dc8014489f8feb6b6ad7994d8c..77ca7e88b9e5c2f1dd80d28452588f85a1120169 100644
+index 42d79b5651e204dc8014489f8feb6b6ad7994d8c..bed9a4f98f566d368a891a8247f3e528f9db910d 100644
 --- a/chrome/browser/accessibility/accessibility_ui.cc
 +++ b/chrome/browser/accessibility/accessibility_ui.cc
 @@ -19,7 +19,10 @@
@@ -101,7 +101,7 @@ index 42d79b5651e204dc8014489f8feb6b6ad7994d8c..77ca7e88b9e5c2f1dd80d28452588f85
 +#if 0
    PrefService* pref = Profile::FromWebUI(web_ui())->GetPrefs();
    bool internal = pref->GetBoolean(prefs::kShowInternalAccessibilityTree);
-+#endif  
++#endif
    std::string accessibility_contents =
 -      web_contents->DumpAccessibilityTree(internal, property_filters);
 +      web_contents->DumpAccessibilityTree(true, property_filters);

patches/chromium/fix_properly_honor_printing_page_ranges.patch

@@ -25,7 +25,7 @@ index f63f7f2674d9562f57dea4f9c9f473aa595a0c5f..78a46dbea7ff31209748ef47d5417253
    // Returns true if duplex mode is set.
    bool SetDuplexModeInPrintSettings(mojom::DuplexMode mode);
 diff --git a/printing/printing_context_mac.mm b/printing/printing_context_mac.mm
-index aa950b59390fdae9a5152affb7a7438cb78eb6f4..3ec9ee0ee464960a48d23f5000137cc44027e9b1 100644
+index aa950b59390fdae9a5152affb7a7438cb78eb6f4..9b5307bda7b73cb502fe185be2a7c02e23a7722c 100644
 --- a/printing/printing_context_mac.mm
 +++ b/printing/printing_context_mac.mm
 @@ -189,7 +189,8 @@ PMPaper MatchPaper(CFArrayRef paper_list,
@@ -45,7 +45,7 @@ index aa950b59390fdae9a5152affb7a7438cb78eb6f4..3ec9ee0ee464960a48d23f5000137cc4
 +bool PrintingContextMac::SetPrintRangeInPrintSettings(const PageRanges& ranges) {
 +  // Default is already NSPrintAllPages - we can safely bail.
 +  if (ranges.empty())
-+    return true; 
++    return true;
 +
 +  auto* print_settings =
 +      static_cast<PMPrintSettings>([print_info_.get() PMPrintSettings]);
@@ -100,14 +100,14 @@ index d3c8677f30d72efc49b28f293260c74c7b8d8b4e..f6e66aaa58ab1881d64dcbb320ae8b5a
    } else {
      // No need to bother, we don't know how many pages are available.
 diff --git a/ui/gtk/printing/print_dialog_gtk.cc b/ui/gtk/printing/print_dialog_gtk.cc
-index f2ed36e1258f4f3ef1bfce972e215e3d5d7335b6..405839e9f944f70106c1c203652044c3abfade3d 100644
+index f2ed36e1258f4f3ef1bfce972e215e3d5d7335b6..5b38bf1369a68546f0aeea8948abba995c65e7f7 100644
 --- a/ui/gtk/printing/print_dialog_gtk.cc
 +++ b/ui/gtk/printing/print_dialog_gtk.cc
 @@ -239,6 +239,24 @@ void PrintDialogGtk::UpdateSettings(
  
    gtk_print_settings_set_n_copies(gtk_settings_, settings->copies());
    gtk_print_settings_set_collate(gtk_settings_, settings->collate());
-+  
++
 +  auto print_ranges = settings->ranges();
 +  if (!print_ranges.empty()) {
 +    // Tell the system that we only intend to print a subset of pages.

patches/chromium/gpu_notify_when_dxdiag_request_fails.patch

@@ -12,14 +12,14 @@ rendering and there is no signal from browser process on this event
 to identify it.
 
 diff --git a/content/browser/gpu/gpu_data_manager_impl.cc b/content/browser/gpu/gpu_data_manager_impl.cc
-index 694f63ecd2de241fd1a8b7b529bbd4d1bea78337..cc9679eb86f85239f5612d8db8200db5392f5bc5 100644
+index 694f63ecd2de241fd1a8b7b529bbd4d1bea78337..705d24cb09a2a8b07ac7acd21b18e2e3483856bf 100644
 --- a/content/browser/gpu/gpu_data_manager_impl.cc
 +++ b/content/browser/gpu/gpu_data_manager_impl.cc
 @@ -229,6 +229,11 @@ void GpuDataManagerImpl::TerminateInfoCollectionGpuProcess() {
    base::AutoLock auto_lock(lock_);
    private_->TerminateInfoCollectionGpuProcess();
  }
-+  
++
 +bool GpuDataManagerImpl::DxdiagDx12VulkanRequested() const {
 +  base::AutoLock auto_lock(lock_);
 +  return private_->DxdiagDx12VulkanRequested();

patches/chromium/mas_no_private_api.patch

@@ -419,7 +419,7 @@ index 894ac47e596c1c96a7e0659be80ed8a5629d0304..eca797a24df79b8502b9698e6ed8830a
  
  }  // namespace
 diff --git a/content/renderer/theme_helper_mac.mm b/content/renderer/theme_helper_mac.mm
-index 1db129740992672a4e8be8100da18b6813f1a4f8..5b1e456020ac859c826dbef2826cacf3bb60108b 100644
+index 1db129740992672a4e8be8100da18b6813f1a4f8..dc18d623869e815d4d1ef64ad8bceb6948f5cc9e 100644
 --- a/content/renderer/theme_helper_mac.mm
 +++ b/content/renderer/theme_helper_mac.mm
 @@ -7,11 +7,11 @@
@@ -445,7 +445,7 @@ index 1db129740992672a4e8be8100da18b6813f1a4f8..5b1e456020ac859c826dbef2826cacf3
 +#else
 +    NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
 +    NSString *default_key = @"CGFontRenderingGetFontSmoothingDisabled";
-+    // Check that key exists since boolForKey defaults to NO when the 
++    // Check that key exists since boolForKey defaults to NO when the
 +    // key is missing and this key in fact defaults to YES;
 +    if ([defaults objectForKey:default_key] == nil)
 +      return false;

script/lint.js

@@ -186,6 +186,11 @@ const LINTERS = [{
         console.warn(`Patch file '${f}' has no description. Every patch must contain a justification for why the patch exists and the plan for its removal.`);
         ok = false;
       }
+      const trailingWhitespace = patchText.split('\n').filter(line => line.startsWith('+')).some(line => /\s+$/.test(line));
+      if (trailingWhitespace) {
+        console.warn(`Patch file '${f}' has trailing whitespace on some lines.`);
+        ok = false;
+      }
     });
     if (!ok) {
       process.exit(1);