[Android] Use UIResource for overscroll glow

content/browser/android/edge_effect.h

Index: content/browser/android/edge_effect.h
diff --git a/content/browser/android/edge_effect.h b/content/browser/android/edge_effect.h
index b8febba22d2a77673be3198c46b4e6d26cc39c21..a8f944c67acada5c73225bd9fd3e3f35120573d2 100644
--- a/content/browser/android/edge_effect.h
+++ b/content/browser/android/edge_effect.h
@@ -6,7 +6,7 @@
 #define CONTENT_BROWSER_ANDROID_EDGE_EFFECT_H_
 
 #include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "ui/gfx/size_f.h"
 
@@ -14,6 +14,10 @@ namespace cc {
 class Layer;
 }
 
+namespace ui {
+class SystemUIResourceManager;
+}
+
 namespace content {
 
 /* |EdgeEffect| mirrors its Android counterpart, EdgeEffect.java.
@@ -24,7 +28,7 @@ namespace content {
  * All coordinates and dimensions are in device pixels.
  */
 class EdgeEffect {
-public:
+ public:
   enum Edge {
     EDGE_TOP = 0,
     EDGE_LEFT,
@@ -33,7 +37,7 @@ public:
     EDGE_COUNT
   };
 
-  EdgeEffect(scoped_refptr<cc::Layer> edge, scoped_refptr<cc::Layer> glow);
+  explicit EdgeEffect(ui::SystemUIResourceManager* resource_manager);
   ~EdgeEffect();
 
   void Pull(base::TimeTicks current_time, float delta_distance);
@@ -50,8 +54,11 @@ public:
                      float glow_height,
                      float offset);
 
-private:
+  void SetParent(cc::Layer* parent);
+
+  static void PreloadResources(ui::SystemUIResourceManager* resource_manager);
 
+ private:
   enum State {
     STATE_IDLE = 0,
     STATE_PULL,
@@ -60,8 +67,9 @@ private:
     STATE_PULL_DECAY
   };
 
-  scoped_refptr<cc::Layer> edge_;
-  scoped_refptr<cc::Layer> glow_;
+  class EffectLayer;
+  scoped_ptr<EffectLayer> edge_;
+  scoped_ptr<EffectLayer> glow_;
 
   float edge_alpha_;
   float edge_scale_y_;