Fix crash when destroying a RenderWidgetHost that holds the pointer

content/browser/renderer_host/render_widget_host_delegate.h

Index: content/browser/renderer_host/render_widget_host_delegate.h
diff --git a/content/browser/renderer_host/render_widget_host_delegate.h b/content/browser/renderer_host/render_widget_host_delegate.h
index 6777b9c999261e7fc63cbc10a9d51c45dbc9a3ff..d25fd8f5744a408cf853c328237c5c86b8b132cf 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -147,7 +147,8 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
   // widget host.

[Charlie Reis, 2016/07/07 21:47:13]

Can you mention what privileged means?

[lfg, 2016/07/11 19:11:29]

Done.

   virtual void RequestToLockMouse(RenderWidgetHostImpl* render_widget_host,
                                   bool user_gesture,
-                                  bool last_unlocked_by_target) {}
+                                  bool last_unlocked_by_target,
+                                  bool privileged) {}
 
   // Return the rect where to display the resize corner, if any, otherwise
   // an empty rect.
@@ -167,6 +168,9 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
   // Notification that the widget has lost the mouse lock.
   virtual void LostMouseLock(RenderWidgetHostImpl* render_widget_host) {}
 
+  // Returns true if |render_widget_host| holds the mouse lock.
+  virtual bool HasMouseLock(RenderWidgetHostImpl* render_widget_host);
+
   // Called when the widget has sent a compositor proto.  This is used in Btlimp
   // mode with the RemoteChannel compositor.
   virtual void ForwardCompositorProto(RenderWidgetHostImpl* render_widget_host,