Allow MessageFilters to restrict listening to specific message classes

chrome/browser/prerender/prerender_browsertest.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 <deque>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 177 matching lines @@
     run_loop_.Run();
     EXPECT_TRUE(channel_destroyed_);
   }
 
  private:
   // When destroyed, calls ChannelDestructionWatcher::OnChannelDestroyed.
   // Ignores all messages.
   class DestructionMessageFilter : public content::BrowserMessageFilter {
    public:
      explicit DestructionMessageFilter(ChannelDestructionWatcher* watcher)
-         : watcher_(watcher) {
+         : BrowserMessageFilter(0),
+           watcher_(watcher) {
     }
 
    private:
     virtual ~DestructionMessageFilter() {
       content::BrowserThread::PostTask(
           content::BrowserThread::UI, FROM_HERE,
           base::Bind(&ChannelDestructionWatcher::OnChannelDestroyed,
                      base::Unretained(watcher_)));
     }
 
@@ skipping 3903 matching lines @@
   }
 };
 
 // Checks that prerendering works in incognito mode.
 IN_PROC_BROWSER_TEST_F(PrerenderIncognitoBrowserTest, PrerenderIncognito) {
   PrerenderTestURL("files/prerender/prerender_page.html", FINAL_STATUS_USED, 1);
   NavigateToDestURL();
 }
 
 }  // namespace prerender