Fix for 'Simple Adblock' extension crashes

content/common/view_messages.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.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/memory/shared_memory.h"
 #include "base/process/process.h"
 #include "base/strings/string16.h"
@@ skipping 549 matching lines @@
                     content::RendererPreferences)
 
 // This passes a set of webkit preferences down to the renderer.
 IPC_MESSAGE_ROUTED1(ViewMsg_UpdateWebPreferences,
                     WebPreferences)
 
 // Informs the renderer that the timezone has changed.
 IPC_MESSAGE_CONTROL0(ViewMsg_TimezoneChange)
 
 // Tells the render view to close.
+// Expects a Close_ACK message when finished.
 IPC_MESSAGE_ROUTED0(ViewMsg_Close)
 
 IPC_STRUCT_BEGIN(ViewMsg_Resize_Params)
   IPC_STRUCT_MEMBER(blink::WebScreenInfo, screen_info)
   IPC_STRUCT_MEMBER(gfx::Size, new_size)
   IPC_STRUCT_MEMBER(gfx::Size, physical_backing_size)
   IPC_STRUCT_MEMBER(float, overdraw_bottom_height)
   IPC_STRUCT_MEMBER(gfx::Size, visible_viewport_size)
   IPC_STRUCT_MEMBER(gfx::Rect, resizer_rect)
   IPC_STRUCT_MEMBER(bool, is_fullscreen)
@@ skipping 514 matching lines @@
 // coordinates) for the string found. If |final_update| is false, it signals
 // that this is not the last Find_Reply message - more will be sent as the
 // scoping effort continues.
 IPC_MESSAGE_ROUTED5(ViewHostMsg_Find_Reply,
                     int /* request_id */,
                     int /* number of matches */,
                     gfx::Rect /* selection_rect */,
                     int /* active_match_ordinal */,
                     bool /* final_update */)
 
+// Indicates that the render view has been closed in respose to a
+// Close message.
+IPC_MESSAGE_CONTROL1(ViewHostMsg_Close_ACK,
+                     int /* old_route_id */);
+
 // Indicates that the current page has been closed, after a ClosePage
 // message.
 IPC_MESSAGE_ROUTED0(ViewHostMsg_ClosePage_ACK)
 
 // Notifies the browser that we have session history information.
 // page_id: unique ID that allows us to distinguish between history entries.
 IPC_MESSAGE_ROUTED2(ViewHostMsg_UpdateState,
                     int32 /* page_id */,
                     content::PageState /* state */)
 
@@ skipping 609 matching lines @@
 // synchronously (see crbug.com/120597). This IPC message sends the character
 // bounds after every composition change to always have correct bound info.
 IPC_MESSAGE_ROUTED2(ViewHostMsg_ImeCompositionRangeChanged,
                     gfx::Range /* composition range */,
                     std::vector<gfx::Rect> /* character bounds */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent ViewMsg, then ifdefs for platform specific ViewMsg, then platform
 // independent ViewHostMsg, then ifdefs for platform specific ViewHostMsg.