cc: Adding support for RGBA_4444 tile textures

content/browser/android/overscroll_glow.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/android/overscroll_glow.h"
 
 #include "base/debug/trace_event.h"
 #include "base/lazy_instance.h"
-#include "cc/layers/image_layer.h"
+#include "cc/layers/picture_image_layer.h"
 #include "content/browser/android/edge_effect.h"
 #include "ui/gfx/android/java_bitmap.h"
 
 using std::max;
 using std::min;
 
 namespace content {
 
 namespace {
 
@@ skipping 19 matching lines @@
   SkBitmap glow_bitmap_;
 
   DISALLOW_COPY_AND_ASSIGN(OverscrollResources);
 };
 
 // Leaky to allow access from a worker thread.
 base::LazyInstance<OverscrollResources>::Leaky g_overscroll_resources =
     LAZY_INSTANCE_INITIALIZER;
 
 scoped_refptr<cc::Layer> CreateImageLayer(const SkBitmap& bitmap) {
-  scoped_refptr<cc::ImageLayer> layer = cc::ImageLayer::Create();
+  scoped_refptr<cc::PictureImageLayer> layer = cc::PictureImageLayer::Create();

[enne (OOO), 2013/09/05 02:01:19]

This seems like the right change to make so that Android isn't using old-style
TiledLayer, but did you figure out what else was wrong with the glow?

[kaanb, 2013/09/06 02:05:54]

Probably bitmap_16 being on stack that Sami pointed out. jdduke@ tells me this
class will be refactored soon.

Yet, we may disable the glow on low-end devices due to other reasons. 

   layer->SetBitmap(bitmap);
   return layer;
 }
 
 bool IsApproxZero(float value) {
   return std::abs(value) < kEpsilon;
 }
 
 gfx::Vector2dF ZeroSmallComponents(gfx::Vector2dF vector) {
   if (IsApproxZero(vector.x()))
@@ skipping 202 matching lines @@
       break;
   };
 }
 
 EdgeEffect* OverscrollGlow::GetOppositeEdge(int edge_index) {
   return edge_effects_[(edge_index + 2) % EdgeEffect::EDGE_COUNT].get();
 }
 
 }  // namespace content