Move middle-click autoscroll to synthetic fling.

third_party/WebKit/Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 630 matching lines @@
 
 void ChromeClientImpl::SetCursorForPlugin(const WebCursorInfo& cursor,
                                           LocalFrame* local_frame) {
   SetCursor(cursor, local_frame);
 }
 
 void ChromeClientImpl::SetCursorOverridden(bool overridden) {
   cursor_overridden_ = overridden;
 }
 
+void ChromeClientImpl::AutoscrollStart(WebFloatPoint viewport_point,
+                                       LocalFrame* local_frame) {
+  LocalFrame& local_root = local_frame->LocalFrameRoot();
+  if (WebFrameWidgetBase* widget =
+          WebLocalFrameImpl::FromFrame(&local_root)->FrameWidget())
+    widget->Client()->AutoscrollStart(viewport_point);
+}
+
+void ChromeClientImpl::AutoscrollFling(WebFloatSize velocity,
+                                       LocalFrame* local_frame) {
+  LocalFrame& local_root = local_frame->LocalFrameRoot();
+  if (WebFrameWidgetBase* widget =
+          WebLocalFrameImpl::FromFrame(&local_root)->FrameWidget())
+    widget->Client()->AutoscrollFling(velocity);
+}
+
+void ChromeClientImpl::AutoscrollEnd(LocalFrame* local_frame) {
+  LocalFrame& local_root = local_frame->LocalFrameRoot();
+  if (WebFrameWidgetBase* widget =
+          WebLocalFrameImpl::FromFrame(&local_root)->FrameWidget())
+    widget->Client()->AutoscrollEnd();
+}
+
 String ChromeClientImpl::AcceptLanguages() {
   return web_view_->Client()->AcceptLanguages();
 }
 
 void ChromeClientImpl::AttachRootGraphicsLayer(GraphicsLayer* root_layer,
                                                LocalFrame* local_frame) {
   DCHECK(!RuntimeEnabledFeatures::SlimmingPaintV2Enabled());
   WebLocalFrameImpl* web_frame =
       WebLocalFrameImpl::FromFrame(local_frame)->LocalRoot();
 
@@ skipping 427 matching lines @@
 std::unique_ptr<WebFrameScheduler> ChromeClientImpl::CreateFrameScheduler(
     BlameContext* blame_context) {
   return web_view_->Scheduler()->CreateFrameScheduler(blame_context);
 }
 
 double ChromeClientImpl::LastFrameTimeMonotonic() const {
   return web_view_->LastFrameTimeMonotonic();
 }
 
 }  // namespace blink