Separate out the TtsController interface from it's impl

chrome/browser/speech/tts_controller_unittest.cc

Index: chrome/browser/speech/tts_controller_unittest.cc
diff --git a/chrome/browser/speech/tts_controller_unittest.cc b/chrome/browser/speech/tts_controller_unittest.cc
index 9b77830ab7cdeb4535c93abdf4b61c24366ee432..088c51e8735394c959dce88d6dce222cced46ec1 100644
--- a/chrome/browser/speech/tts_controller_unittest.cc
+++ b/chrome/browser/speech/tts_controller_unittest.cc
@@ -5,7 +5,7 @@
 // Unit tests for the TTS Controller.
 
 #include "base/values.h"
-#include "chrome/browser/speech/tts_controller.h"
+#include "chrome/browser/speech/tts_controller_impl.h"
 #include "chrome/browser/speech/tts_platform.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -37,7 +37,7 @@ class DummyTtsPlatformImpl : public TtsPlatformImpl {
 };
 
 // Subclass of TtsController with a public ctor and dtor.
-class TestableTtsController : public TtsController {
+class TestableTtsController : public TtsControllerImpl {
  public:
   TestableTtsController() {}
   virtual ~TestableTtsController() {}