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

content/browser/frame_host/render_widget_host_view_guest.cc

Index: content/browser/frame_host/render_widget_host_view_guest.cc
diff --git a/content/browser/frame_host/render_widget_host_view_guest.cc b/content/browser/frame_host/render_widget_host_view_guest.cc
index eef781bda9df2fa37fd4a8d239cab85434f77b13..9c361dc17954772a7d71238324e91bcb66598f96 100644
--- a/content/browser/frame_host/render_widget_host_view_guest.cc
+++ b/content/browser/frame_host/render_widget_host_view_guest.cc
@@ -371,7 +371,8 @@ void RenderWidgetHostViewGuest::CopyFromCompositingSurface(
     const gfx::Rect& src_subrect,
     const gfx::Size& dst_size,
     const base::Callback<void(bool, const SkBitmap&)>& callback,
-    const SkBitmap::Config config) {
+    const SkBitmap::Config config,
+    scoped_ptr<SkBitmap> bitmap) {
   CHECK(guest_);
   guest_->CopyFromCompositingSurface(src_subrect, dst_size, callback);
 }