Added InitTts function to speech synthesis library

Review URL: http://codereview.chromium.org/2510001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@49260 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 11 insertions, 0 deletions

diff --git a/chrome/browser/chromeos/cros/mock_speech_synthesis_library.h b/chrome/browser/chromeos/cros/mock_speech_synthesis_library.h
index f40b9e7..08cf883 100644
--- a/chrome/browser/chromeos/cros/mock_speech_synthesis_library.h
+++ b/chrome/browser/chromeos/cros/mock_speech_synthesis_library.h
@@ -18,6 +18,7 @@ class MockSpeechSynthesisLibrary : public SpeechSynthesisLibrary {
   MOCK_METHOD1(SetSpeakProperties, bool(const char*));
   MOCK_METHOD0(StopSpeaking, bool(void));
   MOCK_METHOD0(IsSpeaking, bool(void));
+  MOCK_METHOD1(InitTts, void(InitStatusCallback));
 };
 
 }  // namespace chromeos
diff --git a/chrome/browser/chromeos/cros/speech_synthesis_library.cc b/chrome/browser/chromeos/cros/speech_synthesis_library.cc
index e7478c5..b70a458 100644
--- a/chrome/browser/chromeos/cros/speech_synthesis_library.cc
+++ b/chrome/browser/chromeos/cros/speech_synthesis_library.cc
@@ -27,4 +27,8 @@ bool SpeechSynthesisLibraryImpl::IsSpeaking() {
   return chromeos::IsSpeaking();
 }
 
+void SpeechSynthesisLibraryImpl::InitTts(InitStatusCallback callback) {
+  chromeos::InitTts(callback);
+}
+
 }  // namespace chromeos
diff --git a/chrome/browser/chromeos/cros/speech_synthesis_library.h b/chrome/browser/chromeos/cros/speech_synthesis_library.h
index f042207..10f2c11 100644
--- a/chrome/browser/chromeos/cros/speech_synthesis_library.h
+++ b/chrome/browser/chromeos/cros/speech_synthesis_library.h
@@ -12,6 +12,8 @@ namespace chromeos {
 // This interface defines the interaction with the ChromeOS login library APIs.
 class SpeechSynthesisLibrary {
  public:
+  typedef void(*InitStatusCallback)(bool success);
+
   virtual ~SpeechSynthesisLibrary() {}
   // Speaks the specified text.
   virtual bool Speak(const char* text) = 0;
@@ -21,6 +23,9 @@ class SpeechSynthesisLibrary {
   virtual bool StopSpeaking() = 0;
   // Checks if the engine is currently speaking.
   virtual bool IsSpeaking() = 0;
+  // Starts the speech synthesis service and indicates through a callback if
+  // it started successfully.
+  virtual void InitTts(InitStatusCallback) = 0;
 };
 
 // This class handles the interaction with the ChromeOS login library APIs.
@@ -34,6 +39,7 @@ class SpeechSynthesisLibraryImpl : public SpeechSynthesisLibrary {
   virtual bool SetSpeakProperties(const char* props);
   virtual bool StopSpeaking();
   virtual bool IsSpeaking();
+  virtual void InitTts(InitStatusCallback);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SpeechSynthesisLibraryImpl);