Support mouse lock in Flash fullscreen mode.

content/browser/web_contents/web_contents_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/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
@@ skipping 1232 matching lines @@
 
   RenderWidgetHostViewPort* widget_host_view =
       RenderWidgetHostViewPort::FromRWHV(GetCreatedWidget(route_id));
   if (!widget_host_view)
     return;
   if (is_fullscreen) {
     widget_host_view->InitAsFullscreen(GetRenderWidgetHostView());
   } else {
     widget_host_view->InitAsPopup(GetRenderWidgetHostView(), initial_pos);
   }
-  RenderWidgetHostImpl::From(widget_host_view->GetRenderWidgetHost())->Init();
+
+  RenderWidgetHostImpl* render_widget_host_impl =
+      RenderWidgetHostImpl::From(widget_host_view->GetRenderWidgetHost());
+  render_widget_host_impl->Init();
+  // Only allow privileged mouse lock for fullscreen render widget, which is
+  // used to implement Pepper Flash fullscreen.
+  render_widget_host_impl->set_allow_privileged_mouse_lock(is_fullscreen);
 
 #if defined(OS_MACOSX)
   // A RenderWidgetHostViewMac has lifetime scoped to the view. Now that it's
   // properly embedded (or purposefully ignored) we can release the retain we
   // took in CreateNewWidget().
   base::mac::NSObjectRelease(widget_host_view->GetNativeView());
 #endif
 }
 
 WebContentsImpl* WebContentsImpl::GetCreatedWindow(int route_id) {
@@ skipping 1806 matching lines @@
       browser_plugin_host()->embedder_render_process_host();
   *embedder_container_id = browser_plugin_host()->instance_id();
   int embedder_process_id =
       embedder_render_process_host ? embedder_render_process_host->GetID() : -1;
   if (embedder_process_id != -1) {
     *embedder_channel_name =
         StringPrintf("%d.r%d", render_view_host->GetProcess()->GetID(),
                      embedder_process_id);
   }
 }