Enable texture readback support for Android

content/browser/renderer_host/render_widget_host_view_android.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 
 #include "base/compiler_specific.h"
 #include "base/i18n/rtl.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process.h"
 #include "content/browser/renderer_host/ime_adapter_android.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebExternalTextureLayer.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "ui/gfx/size.h"
 
 struct ViewHostMsg_TextInputState_Params;
 
 struct GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params;
 struct GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params;
 
 namespace WebKit {
 class WebTouchEvent;
 class WebMouseEvent;
@@ skipping 101 matching lines @@
   void SetContentViewCore(ContentViewCoreImpl* content_view_core);
   SkColor GetCachedBackgroundColor() const;
   void SendKeyEvent(const NativeWebKeyboardEvent& event);
   void SendTouchEvent(const WebKit::WebTouchEvent& event);
   void SendMouseEvent(const WebKit::WebMouseEvent& event);
   void SendMouseWheelEvent(const WebKit::WebMouseWheelEvent& event);
   void SendGestureEvent(const WebKit::WebGestureEvent& event);
 
   int GetNativeImeAdapter();
 
+  WebKit::WebGLId GetScaledContentTexture(const gfx::Size& size);
+  bool PopulateBitmapWithContents(jobject jbitmap);
+
   // Select all text between the given coordinates.
   void SelectRange(const gfx::Point& start, const gfx::Point& end);
 
  private:
   // The model object.
   RenderWidgetHostImpl* host_;
 
   // Whether or not this widget is hidden.
   bool is_hidden_;
 
   // ContentViewCoreImpl is our interface to the view system.
   ContentViewCoreImpl* content_view_core_;
 
   // The size that we want the renderer to be.  We keep this in a separate
   // variable because resizing is async.
   gfx::Size requested_size_;
 
   ImeAdapterAndroid ime_adapter_android_;
 
   // Body background color of the underlying document.
   SkColor cached_background_color_;
 
   // The texture layer for this view when using browser-side compositing.
   scoped_ptr<WebKit::WebExternalTextureLayer> texture_layer_;
 
+  // The most recent texture id that was pushed to the texture layer.
+  unsigned int texture_id_in_layer_;
+
   // The handle for the transport surface (between renderer and browser-side
   // compositor) for this view.
   gfx::GLSurfaceHandle shared_surface_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_