[blink] Request compositing update when canvas hibernates/wakes up.

third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 510 matching lines @@
   SkPaint copy_paint;
   copy_paint.setBlendMode(SkBlendMode::kSrc);
   surface_->draw(temp_hibernation_surface->getCanvas(), 0, 0,
                  &copy_paint);  // GPU readback
   hibernation_image_ = temp_hibernation_surface->makeImageSnapshot();
   ResetSurface();
   layer_->ClearTexture();
 #if USE_IOSURFACE_FOR_2D_CANVAS
   ClearCHROMIUMImageCache();
 #endif  // USE_IOSURFACE_FOR_2D_CANVAS
+  // shouldBeDirectComposited() may have changed.
+  if (image_buffer_)
+    image_buffer_->SetNeedsCompositingUpdate();
   logger_->DidStartHibernating();
 }
 
 sk_sp<SkColorSpace> Canvas2DLayerBridge::SkSurfaceColorSpace() const {
   if (sk_surfaces_use_color_space_)
     return color_space_.ToSkColorSpace();
   return nullptr;
 }
 
 void Canvas2DLayerBridge::ReportSurfaceCreationFailure() {
@@ skipping 59 matching lines @@
       else
         logger_->ReportHibernationEvent(kHibernationEndedWithFallbackToSW);
     }
 
     SkPaint copy_paint;
     copy_paint.setBlendMode(SkBlendMode::kSrc);
     surface_->getCanvas()->drawImage(hibernation_image_.get(), 0, 0,
                                      &copy_paint);
     hibernation_image_.reset();
 
-    if (image_buffer_)
+    if (image_buffer_) {
       image_buffer_->UpdateGPUMemoryUsage();
 
-    if (image_buffer_ && !is_deferral_enabled_)
-      image_buffer_->ResetCanvas(surface_paint_canvas_.get());
+      if (!is_deferral_enabled_)
+        image_buffer_->ResetCanvas(surface_paint_canvas_.get());
+
+      // shouldBeDirectComposited() may have changed.
+      image_buffer_->SetNeedsCompositingUpdate();
+    }
   }
 
   return surface_.get();
 }
 
 PaintCanvas* Canvas2DLayerBridge::Canvas() {
   if (!is_deferral_enabled_) {
     GetOrCreateSurface();
     return surface_paint_canvas_.get();
   }
@@ skipping 505 matching lines @@
     default;
 
 void Canvas2DLayerBridge::Logger::ReportHibernationEvent(
     HibernationEvent event) {
   DEFINE_STATIC_LOCAL(EnumerationHistogram, hibernation_histogram,
                       ("Canvas.HibernationEvents", kHibernationEventCount));
   hibernation_histogram.Count(event);
 }
 
 }  // namespace blink