Move BrowserMessageFilter to public, and into content namespace.

content/public/browser/browser_message_filter.h

Index: content/public/browser/browser_message_filter.h
diff --git a/content/browser/browser_message_filter.h b/content/public/browser/browser_message_filter.h
similarity index 92%
rename from content/browser/browser_message_filter.h
rename to content/public/browser/browser_message_filter.h
index 78f50959ba45e4bc48249b11fd5c4802156df17f..16c23e741bdc4cdda392438b26f9c53060fbd791 100644
--- a/content/browser/browser_message_filter.h
+++ b/content/public/browser/browser_message_filter.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_BROWSER_BROWSER_MESSAGE_FILTER_H_
-#define CONTENT_BROWSER_BROWSER_MESSAGE_FILTER_H_
+#ifndef CONTENT_PUBLIC_BROWSER_BROWSER_MESSAGE_FILTER_H_
+#define CONTENT_PUBLIC_BROWSER_BROWSER_MESSAGE_FILTER_H_
 #pragma once
 
 #include "base/process.h"
@@ -11,6 +11,8 @@
 #include "content/public/browser/browser_thread.h"
 #include "ipc/ipc_channel_proxy.h"
 
+namespace content {
+
 // Base class for message filters in the browser process.  You can receive and
 // send messages on any thread.
 class CONTENT_EXPORT BrowserMessageFilter :
@@ -68,4 +70,6 @@ class CONTENT_EXPORT BrowserMessageFilter :
   base::ProcessHandle peer_handle_;
 };
 
-#endif  // CONTENT_BROWSER_BROWSER_MESSAGE_FILTER_H_
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_BROWSER_MESSAGE_FILTER_H_