Remove FINAL_STATUS_HTML5_MEDIA and related messages.

chrome/common/render_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.
 
 // Multiply-included file, no traditional include guard.
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 605 matching lines @@
 IPC_MESSAGE_CONTROL1(ChromeViewHostMsg_ResourceTypeStats,
                      WebKit::WebCache::ResourceTypeStats)
 
 // Notifies the browser that a page has been translated.
 IPC_MESSAGE_ROUTED4(ChromeViewHostMsg_PageTranslated,
                     int,                  /* page id */
                     std::string           /* the original language */,
                     std::string           /* the translated language */,
                     TranslateErrors::Type /* the error type if available */)
 
-// Message sent from the renderer to the browser to notify it of events which
-// may lead to the cancellation of a prerender. The message is sent only when
-// the renderer is prerendering.
-IPC_MESSAGE_ROUTED0(ChromeViewHostMsg_MaybeCancelPrerenderForHTML5Media)
-
 // Message sent from the renderer to the browser to notify it of a
 // window.print() call which should cancel the prerender. The message is sent
 // only when the renderer is prerendering.
 IPC_MESSAGE_ROUTED0(ChromeViewHostMsg_CancelPrerenderForPrinting)
 
 // Sent by the renderer to check if a URL has permission to trigger a clipboard
 // read/write operation from the DOM.
 IPC_SYNC_MESSAGE_ROUTED1_1(ChromeViewHostMsg_CanTriggerClipboardRead,
                            GURL /* origin */,
                            bool /* allowed */)
@@ skipping 119 matching lines @@
                     int /* page_id */,
                     bool /* supported */)
 
 // Tells listeners that a detailed message was reported to the console by
 // WebKit.
 IPC_MESSAGE_ROUTED4(ChromeViewHostMsg_DetailedConsoleMessageAdded,
                     string16 /* message */,
                     string16 /* source */,
                     extensions::StackTrace /* stack trace */,
                     int32 /* severity level */)