[Android] Implement asynchronous zero-copy bitmap capture API.

content/browser/android/content_view_core_impl.h

Index: content/browser/android/content_view_core_impl.h
diff --git a/content/browser/android/content_view_core_impl.h b/content/browser/android/content_view_core_impl.h
index d88af6d8def910a9275e77ae1260c20b9b732511..ee00ad6a35f2de6814fd2ef79c52ea824ab328b6 100644
--- a/content/browser/android/content_view_core_impl.h
+++ b/content/browser/android/content_view_core_impl.h
@@ -9,6 +9,7 @@
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_helper.h"
+#include "base/android/scoped_java_ref.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/i18n/rtl.h"
@@ -26,6 +27,10 @@
 #include "ui/gfx/rect_f.h"
 #include "url/gurl.h"
 
+namespace gfx {
+class JavaBitmap;
+}
+
 namespace ui {
 class ViewAndroid;
 class WindowAndroid;
@@ -59,7 +64,10 @@ class ContentViewCoreImpl : public ContentViewCore,
   virtual void ShowPastePopup(int x, int y) OVERRIDE;
   virtual void GetScaledContentBitmap(
       float scale,
-      const base::Callback<void(bool, const SkBitmap&)>& result_callback)
+      const base::Callback<void(bool, const SkBitmap&)>& result_callback,
+      SkBitmap::Config bitmap_config = SkBitmap::kARGB_8888_Config,
+      const gfx::Rect& bounding_rect = gfx::Rect(),
+      const BitmapAllocator bitmap_allocator = BitmapAllocator())
       OVERRIDE;
   virtual float GetDpiScale() const OVERRIDE;
   virtual void PauseVideo() OVERRIDE;
@@ -200,6 +208,14 @@ class ContentViewCoreImpl : public ContentViewCore,
   jboolean PopulateBitmapFromCompositor(JNIEnv* env,
                                         jobject obj,
                                         jobject jbitmap);
+  void PopulateBitmapFromCompositorAsync(JNIEnv* env,
+                                         jobject obj,
+                                         jint x,
+                                         jint y,
+                                         jint width,
+                                         jint height,
+                                         jfloat scale,
+                                         jobject jbitmap_config);
   void WasResized(JNIEnv* env, jobject obj);
   jboolean IsRenderWidgetHostViewReady(JNIEnv* env, jobject obj);
   void ExitFullscreen(JNIEnv* env, jobject obj);
@@ -244,7 +260,12 @@ class ContentViewCoreImpl : public ContentViewCore,
                            int selected_item,
                            bool multiple);
 
+  void ProxyBitmapAllocator(SkBitmap*& bitmap,
+                            const gfx::Size& computed_size,
+                            SkBitmap::Config bitmap_config);
+
   void OnTabCrashed();
+  void OnBitmapReady(bool result, const SkBitmap& bitmap);
 
   // All sizes and offsets are in CSS pixels as cached by the renderer.
   void UpdateFrameInfo(const gfx::Vector2dF& scroll_offset,
@@ -396,6 +417,8 @@ class ContentViewCoreImpl : public ContentViewCore,
   bool handling_touch_event_;
   blink::WebTouchEvent pending_touch_event_;
   GestureEventPacket pending_gesture_packet_;
+  base::android::ScopedJavaGlobalRef<jobject> jbitmap_;
+  scoped_ptr<gfx::JavaBitmap> java_bitmap_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentViewCoreImpl);
 };