Removing canvas rendering mode switching feature

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 16 matching lines @@
 
 #include <memory>
 #include "base/memory/ptr_util.h"
 #include "cc/resources/single_release_callback.h"
 #include "cc/resources/texture_mailbox.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
 #include "platform/Histogram.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/WebTaskRunner.h"
+#include "platform/graphics/CanvasHeuristicParameters.h"
 #include "platform/graphics/CanvasMetrics.h"
-#include "platform/graphics/ExpensiveCanvasHeuristicParameters.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/ImageBuffer.h"
 #include "platform/graphics/gpu/SharedContextRateLimiter.h"
 #include "platform/graphics/paint/PaintCanvas.h"
 #include "platform/instrumentation/tracing/TraceEvent.h"
 #include "platform/scheduler/child/web_scheduler.h"
 #include "platform/wtf/PtrUtil.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebCompositorSupport.h"
 #include "public/platform/WebGraphicsContext3DProvider.h"
@@ skipping 988 matching lines @@
   return layer_->Layer();
 }
 
 void Canvas2DLayerBridge::DidDraw(const FloatRect& rect) {
   if (is_deferral_enabled_) {
     have_recorded_draw_commands_ = true;
     IntRect pixel_bounds = EnclosingIntRect(rect);
     recording_pixel_count_ += pixel_bounds.Width() * pixel_bounds.Height();
     if (recording_pixel_count_ >=
         (size_.Width() * size_.Height() *
-         ExpensiveCanvasHeuristicParameters::kExpensiveOverdrawThreshold)) {
+         CanvasHeuristicParameters::kExpensiveOverdrawThreshold)) {
       DisableDeferral(kDisableDeferralReasonExpensiveOverdrawHeuristic);
     }
   }
   did_draw_since_last_flush_ = true;
   did_draw_since_last_gpu_flush_ = true;
 }
 
 void Canvas2DLayerBridge::FinalizeFrame() {
   TRACE_EVENT0("blink", "Canvas2DLayerBridge::finalizeFrame");
   DCHECK(!destruction_in_progress_);
@@ skipping 70 matching lines @@
     default;
 
 void Canvas2DLayerBridge::Logger::ReportHibernationEvent(
     HibernationEvent event) {
   DEFINE_STATIC_LOCAL(EnumerationHistogram, hibernation_histogram,
                       ("Canvas.HibernationEvents", kHibernationEventCount));
   hibernation_histogram.Count(event);
 }
 
 }  // namespace blink