Fix rate, pitch, and volume from web speech synthesis API to extensions.

chrome/browser/speech/extension_api/tts_engine_extension_api.cc

Index: chrome/browser/speech/extension_api/tts_engine_extension_api.cc
diff --git a/chrome/browser/speech/extension_api/tts_engine_extension_api.cc b/chrome/browser/speech/extension_api/tts_engine_extension_api.cc
index 6db90bedc4683c36d480facef4f72789e479b3bc..bc050e17c84965f2e3315e854f37de1b5edbd2c3 100644
--- a/chrome/browser/speech/extension_api/tts_engine_extension_api.cc
+++ b/chrome/browser/speech/extension_api/tts_engine_extension_api.cc
@@ -163,6 +163,22 @@ void TtsExtensionEngine::Speak(Utterance* utterance,
   if (options->HasKey(constants::kOnEventKey))
     options->Remove(constants::kOnEventKey, NULL);
 
+  // Get the volume, pitch, and rate, but only if they weren't already in
+  // the options. TODO(dmazzoni): these shouldn't be redundant.
+  // http://crbug.com/463264
+  if (!options->HasKey(constants::kRateKey)) {
+    options->SetDouble(constants::kRateKey,
+                       utterance->continuous_parameters().rate);
+  }
+  if (!options->HasKey(constants::kPitchKey)) {
+    options->SetDouble(constants::kPitchKey,
+                       utterance->continuous_parameters().pitch);
+  }
+  if (!options->HasKey(constants::kVolumeKey)) {
+    options->SetDouble(constants::kVolumeKey,
+                       utterance->continuous_parameters().volume);
+  }
+
   // Add the voice name and language to the options if they're not
   // already there, since they might have been picked by the TTS controller
   // rather than directly by the client that requested the speech.
@@ -174,6 +190,9 @@ void TtsExtensionEngine::Speak(Utterance* utterance,
   args->Append(options.release());
   args->AppendInteger(utterance->id());
 
+  std::string json;
+  base::JSONWriter::Write(args.get(), &json);
+
   scoped_ptr<extensions::Event> event(new extensions::Event(
       tts_engine_events::kOnSpeak, args.Pass()));
   Profile* profile = Profile::FromBrowserContext(utterance->browser_context());