Differentiate invisible cursor mode and disabled mouse events mode.

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/bind.h"
@@ skipping 4095 matching lines @@
   bool is_pinned_to_right = offset.width >= maximum_offset.width;
 
   if (is_pinned_to_left != cached_is_main_frame_pinned_to_left_ ||
       is_pinned_to_right != cached_is_main_frame_pinned_to_right_) {
     Send(new ViewHostMsg_DidChangeScrollOffsetPinningForMainFrame(
           routing_id_, is_pinned_to_left, is_pinned_to_right));
 
     cached_is_main_frame_pinned_to_left_ = is_pinned_to_left;
     cached_is_main_frame_pinned_to_right_ = is_pinned_to_right;
   }
+
+  Send(new ViewHostMsg_DidChangeScrollOffset(
+      routing_id_, gfx::Vector2d(offset.width, offset.height)));
 }
 
 void RenderViewImpl::didChangeScrollOffset(WebFrame* frame) {
   StartNavStateSyncTimerIfNecessary();
 
   if (webview()->mainFrame() == frame)
     UpdateScrollState(frame);
 
   FOR_EACH_OBSERVER(
       RenderViewObserver, observers_, DidChangeScrollOffset(frame));
@@ skipping 2457 matching lines @@
 }
 #endif
 
 void RenderViewImpl::OnReleaseDisambiguationPopupDIB(
     TransportDIB::Handle dib_handle) {
   TransportDIB* dib = TransportDIB::CreateWithHandle(dib_handle);
   RenderProcess::current()->ReleaseTransportDIB(dib);
 }
 
 }  // namespace content