Make PostTask and Send failures in input routing fatal.

content/renderer/render_widget.h

 // 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.
 
 #ifndef CONTENT_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 789 matching lines @@
 
   // Wraps the |webwidget_| as a MouseLockDispatcher::LockTarget interface.
   std::unique_ptr<MouseLockDispatcher::LockTarget> webwidget_mouse_lock_target_;
 
  private:
   // Applies/Removes the DevTools device emulation transformation to/from a
   // window rect.
   void ScreenRectToEmulatedIfNeeded(blink::WebRect* window_rect) const;
   void EmulatedToScreenRectIfNeeded(blink::WebRect* window_rect) const;
 
+  bool CreateWidget(int32_t opener_id,
+                    blink::WebPopupType popup_type,
+                    int32_t* routing_id);
+
+  // A variant of Send but is fatal if it fails. The browser may
+  // be waiting for this IPC Message and if the send fails the browser will
+  // be left in a state waiting for something that never comes. And if it
+  // never comes then it may later determine this is a hung renderer; so
+  // instead fail right away.
+  void SendOrCrash(IPC::Message* msg);
+
   // Indicates whether this widget has focus.
   bool has_focus_;
 
 #if defined(OS_MACOSX)
   // Responds to IPCs from TextInputClientMac regarding getting string at given
   // position or range as well as finding character index at a given position.
   std::unique_ptr<TextInputClientObserver> text_input_client_observer_;
 #endif
 
   // This reference is set by the RenderFrame and is used to query the IME-
   // related state from the plugin to later send to the browser.
   PepperPluginInstanceImpl* focused_pepper_plugin_;
 
   // Stores edit commands associated to the next key event.
   // Will be cleared as soon as the next key event is processed.
   EditCommands edit_commands_;
 
   // This field stores drag/drop related info for the event that is currently
   // being handled. If the current event results in starting a drag/drop
   // session, this info is sent to the browser along with other drag/drop info.
   DragEventSourceInfo possible_drag_event_info_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_