Delegate root layer scroll offset to android_webview.

content/renderer/render_view_impl.cc

 // 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.
 
 #include "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 202 matching lines @@
 
 #if defined(OS_ANDROID)
 #include <cpu-features.h>
 
 #include "content/common/android/device_telephony_info.h"
 #include "content/common/gpu/client/context_provider_command_buffer.h"
 #include "content/renderer/android/address_detector.h"
 #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"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebFloatRect.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebHitTestResult.h"
 #include "ui/gfx/rect_f.h"
 #include "webkit/media/android/webmediaplayer_android.h"
 #include "webkit/media/android/webmediaplayer_manager_android.h"
 #elif defined(OS_WIN)
 // TODO(port): these files are currently Windows only because they concern:
@@ skipping 2384 matching lines @@
 
 void RenderViewImpl::didActivateCompositor(int input_handler_identifier) {
 #if !defined(OS_MACOSX)  // many events are unhandled - http://crbug.com/138003
   InputHandlerManager* input_handler_manager =
       RenderThreadImpl::current()->input_handler_manager();
   if (input_handler_manager) {
      input_handler_manager->AddInputHandler(
         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
 
   RenderWidget::didActivateCompositor(input_handler_identifier);
 }
 
 void RenderViewImpl::didHandleGestureEvent(
     const WebGestureEvent& event,
     bool event_cancelled) {
   RenderWidget::didHandleGestureEvent(event, event_cancelled);
@@ skipping 3928 matching lines @@
     WebURL url = icon_urls[i].iconURL();
     if (!url.isEmpty())
       urls.push_back(FaviconURL(url,
                                 ToFaviconType(icon_urls[i].iconType())));
   }
   SendUpdateFaviconURL(urls);
 }
 
 
 }  // namespace content