Move BrowserMessageFilter to public, and into content namespace.

content/browser/device_orientation/message_filter.h

Index: content/browser/device_orientation/message_filter.h
diff --git a/content/browser/device_orientation/message_filter.h b/content/browser/device_orientation/message_filter.h
index 2147daeba87be64edd618c097a0b41a42bf9db0b..a675c18215bd015011cd4b3b959c6d2cd5de3515 100644
--- a/content/browser/device_orientation/message_filter.h
+++ b/content/browser/device_orientation/message_filter.h
@@ -7,16 +7,16 @@
 
 #include <map>
 
-#include "content/browser/browser_message_filter.h"
 #include "content/browser/device_orientation/provider.h"
+#include "content/public/browser/browser_message_filter.h"
 
 namespace device_orientation {
 
-class MessageFilter : public BrowserMessageFilter {
+class MessageFilter : public content::BrowserMessageFilter {
  public:
   MessageFilter();
 
-  // BrowserMessageFilter implementation.
+  // content::BrowserMessageFilter implementation.
   virtual bool OnMessageReceived(const IPC::Message& message,
                                  bool* message_was_ok) OVERRIDE;