Delegate root layer scroll offset to android_webview.

content/renderer/render_widget.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_widget.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 39 matching lines @@
 #include "ui/base/ui_base_switches.h"
 #include "ui/gfx/rect_conversions.h"
 #include "ui/gfx/size_conversions.h"
 #include "ui/gfx/skia_util.h"
 #include "ui/gl/gl_switches.h"
 #include "ui/surface/transport_dib.h"
 #include "webkit/glue/webkit_glue.h"
 #include "webkit/plugins/npapi/webplugin.h"
 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 #include "webkit/renderer/compositor_bindings/web_rendering_stats_impl.h"
+#include "webkit/renderer/compositor_bindings/web_to_ccinput_handler_adapter.h"
 
 #if defined(OS_ANDROID)
+#include "content/renderer/android/synchronous_compositor_impl.h"
 #include "content/renderer/android/synchronous_compositor_output_surface.h"
 #endif
 
 #if defined(OS_POSIX)
 #include "ipc/ipc_channel_posix.h"
 #include "third_party/skia/include/core/SkMallocPixelRef.h"
 #include "third_party/skia/include/core/SkPixelRef.h"
 #endif  // defined(OS_POSIX)
 
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebWidget.h"
@@ skipping 501 matching lines @@
 
 bool RenderWidget::ForceCompositingModeEnabled() {
   return false;
 }
 
 scoped_ptr<cc::OutputSurface> RenderWidget::CreateOutputSurface() {
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 
 #if defined(OS_ANDROID)
   if (command_line.HasSwitch(switches::kEnableSynchronousRendererCompositor)) {
-    return scoped_ptr<cc::OutputSurface>(
-        new SynchronousCompositorOutputSurface(routing_id()));
+    return GetSynchronousCompositor()->CreateOutputSurface();
   }
 #endif
 
   if (command_line.HasSwitch(switches::kEnableSoftwareCompositingGLAdapter)) {
       return scoped_ptr<cc::OutputSurface>(
           new CompositorOutputSurface(routing_id(), NULL,
               new CompositorSoftwareOutputDevice()));
   }
 
   // Explicitly disable antialiasing for the compositor. As of the time of
@@ skipping 18 matching lines @@
   bool composite_to_mailbox =
       command_line.HasSwitch(cc::switches::kCompositeToMailbox) &&
       !command_line.HasSwitch(switches::kEnableDelegatedRenderer);
   // No swap throttling yet when compositing on the main thread.
   DCHECK(!composite_to_mailbox || is_threaded_compositing_enabled_);
   return scoped_ptr<cc::OutputSurface>(composite_to_mailbox ?
       new MailboxOutputSurface(routing_id(), context, NULL) :
           new CompositorOutputSurface(routing_id(), context, NULL));
 }
 
+scoped_ptr<cc::InputHandlerClient> RenderWidget::CreateInputHandlerClient() {
+  scoped_ptr<cc::InputHandlerClient> ret;
+  scoped_ptr<WebKit::WebInputHandler> web_handler(
+      webwidget_->createInputHandler());
+  if (web_handler)
+    ret = WebKit::WebToCCInputHandlerAdapter::create(web_handler.Pass());
+#if defined(OS_ANDROID)
+  if (ret && GetSynchronousCompositor()) {
+    ret = GetSynchronousCompositor()->CreateInputHandlerClientWrapper(
+        ret.Pass());
+  }
+#endif
+  return ret.Pass();
+}
+
+SynchronousCompositorImpl* RenderWidget::GetSynchronousCompositor() {
+#if defined(OS_ANDROID)
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  if (command_line.HasSwitch(switches::kEnableSynchronousRendererCompositor)) {
+    synchronous_compositor_.reset(new SynchronousCompositorImpl(routing_id()));
+  }
+  return synchronous_compositor_.get();
+#else
+  return NULL;

[joth, 2013/05/16 18:21:42]

awkward - this is unreachable as this function is never called on non-ANDROID
platform.

Maybe remove all the #if ANDROID from call sites and just have this one in here?

+#endif
+}
+
 void RenderWidget::OnViewContextSwapBuffersAborted() {
   TRACE_EVENT0("renderer", "RenderWidget::OnSwapBuffersAborted");
   while (!updates_pending_swap_.empty()) {
     ViewHostMsg_UpdateRect* msg = updates_pending_swap_.front();
     updates_pending_swap_.pop_front();
     // msg can be NULL if the swap doesn't correspond to an DoDeferredUpdate
     // compositing pass, hence doesn't require an UpdateRect message.
     if (msg)
       Send(msg);
   }
@@ skipping 1715 matching lines @@
 
   if (!context->Initialize(
           attributes,
           false /* bind generates resources */,
           CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE))
     return NULL;
   return context.release();
 }
 
 }  // namespace content