Expose the capturePicture feature in RenderView for Android WebView legacy API support.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 8dde7b7da823272dab6b3713f96a58f10274d5a8..e50cf138adf754beea832f802a68e577d77d1d71 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -27,6 +27,7 @@
 #include "base/sys_string_conversions.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
+#include "cc/layer_tree_host.h"
 #include "cc/output_surface.h"
 #include "cc/switches.h"
 #include "content/common/appcache/appcache_dispatcher.h"
@@ -181,6 +182,7 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebWindowFeatures.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/default/WebRenderTheme.h"
 #include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkPicture.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/point.h"
@@ -6616,6 +6618,11 @@ bool RenderViewImpl::didTapMultipleTargets(
 
   return true;
 }
+
+skia::RefPtr<SkPicture> RenderViewImpl::CapturePicture() {
+  return compositor_ ? compositor_->layer_tree_host()->capturePicture() :
+      skia::RefPtr<SkPicture>();
+}
 #endif
 
 void RenderViewImpl::OnReleaseDisambiguationPopupDIB(
@@ -6624,4 +6631,9 @@ void RenderViewImpl::OnReleaseDisambiguationPopupDIB(
   RenderProcess::current()->ReleaseTransportDIB(dib);
 }
 
+void RenderViewImpl::DidCommitCompositorFrame() {
+  RenderWidget::DidCommitCompositorFrame();
+  FOR_EACH_OBSERVER(RenderViewObserver, observers_, DidCommitCompositorFrame());
+}
+
 }  // namespace content