Cache auxiliary bitmap across draw frames

android_webview/browser/browser_view_renderer.h

 // 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.
 
 #ifndef ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_H_
 #define ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_H_
 
 #include "base/android/scoped_java_ref.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/rect.h"
@@ skipping 35 matching lines @@
     virtual ~Client() {}
   };
 
   // Delegate to perform rendering actions involving Java objects.
   class JavaHelper {
    public:
     // Creates a RGBA_8888 Java Bitmap object of the requested size.
     virtual base::android::ScopedJavaLocalRef<jobject> CreateBitmap(
         JNIEnv* env,
         int width,
-        int height) = 0;
+        int height,
+        bool cache_result) = 0;
 
     // Draws the provided Java Bitmap into the provided Java Canvas.
     virtual void DrawBitmapIntoCanvas(
         JNIEnv* env,
         const base::android::JavaRef<jobject>& jbitmap,
         const base::android::JavaRef<jobject>& jcanvas) = 0;
 
     // Creates a Java Picture object that records drawing the provided Bitmap.
     virtual base::android::ScopedJavaLocalRef<jobject> RecordBitmapIntoPicture(
         JNIEnv* env,
@@ skipping 31 matching lines @@
   virtual bool IsAttachedToWindow() = 0;
   virtual bool IsViewVisible() = 0;
   virtual gfx::Rect GetScreenRect() = 0;
 
   virtual ~BrowserViewRenderer() {}
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_H_