Delegate root layer scroll offset to android_webview.

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 10304771b1a7636484fea342cce24c2707e7bd2e..ece1b288a9e153908077f950be319255d88b7ee8 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -220,6 +220,7 @@
 #include "content/renderer/android/content_detector.h"
 #include "content/renderer/android/email_detector.h"
 #include "content/renderer/android/phone_number_detector.h"
+#include "content/renderer/android/synchronous_compositor_impl.h"
 #include "content/renderer/media/stream_texture_factory_impl_android.h"
 #include "content/renderer/media/webmediaplayer_proxy_impl_android.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebFloatPoint.h"
@@ -2624,6 +2625,11 @@ void RenderViewImpl::didActivateCompositor(int input_handler_identifier) {
         routing_id_,
         compositor_->GetInputHandler(),
         AsWeakPtr());
+
+     if (GetSynchronousCompositor()) {
+       input_handler_manager->SetRootLayerScrollDelegate(
+           routing_id_, GetSynchronousCompositor());

[joth, 2013/05/29 00:46:25]

do you mean GetSynchronousCompositor() here, or something like
GetSynchronousCompositor()->GetInputHandlerScrollDelegate() ?

[mkosiba (inactive), 2013/05/29 13:18:24]

This is fine. I just forgot to make SynchronousCompositorImpl inherit from
RootLayerScrollDelegate.

+     }
   }
 #endif