Eliminate the dependency of Profile from TtsMessageFilter.

chrome/browser/speech/tts_message_filter.h

Index: chrome/browser/speech/tts_message_filter.h
diff --git a/chrome/browser/speech/tts_message_filter.h b/chrome/browser/speech/tts_message_filter.h
index 154f4827139986202f9f656f46f3bef3f2e70b8a..cecb2ba6dc32dc698fa2403e9ffa2ecde4b17ffc 100644
--- a/chrome/browser/speech/tts_message_filter.h
+++ b/chrome/browser/speech/tts_message_filter.h
@@ -10,7 +10,9 @@
 #include "chrome/common/tts_messages.h"
 #include "content/public/browser/browser_message_filter.h"
 
-class Profile;
+namespace content {
+class BrowserContext;
+}
 
 class TtsMessageFilter
     : public content::BrowserMessageFilter,
@@ -18,7 +20,8 @@ class TtsMessageFilter
       public VoicesChangedDelegate,
       public base::SupportsWeakPtr<TtsMessageFilter> {
  public:
-  TtsMessageFilter(int render_process_id, Profile* profile);
+  explicit TtsMessageFilter(int render_process_id,
+      content::BrowserContext* browser_context);
 
   // content::BrowserMessageFilter implementation.
   virtual void OverrideThreadForMessage(
@@ -52,7 +55,7 @@ class TtsMessageFilter
   void OnChannelClosingInUIThread();
 
   int render_process_id_;
-  Profile* profile_;
+  content::BrowserContext* browser_context_;
 
   DISALLOW_COPY_AND_ASSIGN(TtsMessageFilter);
 };