Implement active wheel fling transfer via WebCompositorInputHandlerClient

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"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/stl_util.h"
 #include "base/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "content/common/swapped_out_messages.h"
 #include "content/common/view_messages.h"
 #include "content/public/common/content_switches.h"
-#include "content/renderer/gpu/compositor_thread.h"
 #include "content/renderer/render_process.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/renderer_webkitplatformsupport_impl.h"
 #include "ipc/ipc_sync_message.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/skia/include/core/SkShader.h"
 #include "third_party/skia/include/effects/SkTableColorFilter.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebCursorInfo.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebPoint.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPagePopup.h"
@@ skipping 1037 matching lines @@
       FROM_HERE, base::Bind(&RenderWidget::InvalidationCallback, this));
 }
 
 void RenderWidget::didAutoResize(const WebSize& new_size) {
   size_ = new_size;
 }
 
 void RenderWidget::didActivateCompositor(int input_handler_identifier) {
   TRACE_EVENT0("gpu", "RenderWidget::didActivateCompositor");
 
-  CompositorThread* compositor_thread =
-      RenderThreadImpl::current()->compositor_thread();
-  if (compositor_thread)
-    compositor_thread->AddInputHandler(routing_id_, input_handler_identifier);
-
   if (!is_accelerated_compositing_active_) {
     // When not in accelerated compositing mode, in certain cases (e.g. waiting
     // for a resize or if no backing store) the RenderWidgetHost is blocking the
     // browser's UI thread for some time, waiting for an UpdateRect. If we are
     // going to switch to accelerated compositing, the GPU process may need
     // round-trips to the browser's UI thread before finishing the frame,
     // causing deadlocks if we delay the UpdateRect until we receive the
     // OnSwapBuffersComplete.  So send a dummy message that will unblock the
     // browser's UI thread.
     Send(new ViewHostMsg_UpdateIsDelayed(routing_id_));
@@ skipping 583 matching lines @@
   }
 }
 
 bool RenderWidget::WillHandleMouseEvent(const WebKit::WebMouseEvent& event) {
   return false;
 }
 
 bool RenderWidget::WebWidgetHandlesCompositorScheduling() const {
   return false;
 }