Implement Google network speech synthesis.

See bug for context. Implements a component extension
that provides speech synthesis using Google's speech
synthesis API.

Adds a "remote" flag to the TTS and TTS Engine APIs
so that it's possible for clients to distinguish
between local and remote speech engines.

Adds a new private extension API to expose Google's
API key, needed to make the request.

BUG=308250

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=232242

Review URL: https://codereview.chromium.org/27034009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232412 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 9 insertions, 1 deletions

diff --git a/chrome/common/extensions/api/speech/tts_engine_manifest_handler.cc b/chrome/common/extensions/api/speech/tts_engine_manifest_handler.cc
index bed4937..e18c594 100644
--- a/chrome/common/extensions/api/speech/tts_engine_manifest_handler.cc
+++ b/chrome/common/extensions/api/speech/tts_engine_manifest_handler.cc
@@ -29,7 +29,8 @@ struct TtsVoices : public Extension::ManifestData {
 
 }  // namespace
 
-TtsVoice::TtsVoice() {}
+TtsVoice::TtsVoice() : remote(false) {}
+
 TtsVoice::~TtsVoice() {}
 
 // static
@@ -95,6 +96,13 @@ bool TtsEngineManifestHandler::Parse(Extension* extension, string16* error) {
         return false;
       }
     }
+    if (one_tts_voice->HasKey(keys::kTtsVoicesRemote)) {
+      if (!one_tts_voice->GetBoolean(
+              keys::kTtsVoicesRemote, &voice_data.remote)) {
+        *error = ASCIIToUTF16(errors::kInvalidTtsVoicesRemote);
+        return false;
+      }
+    }
     if (one_tts_voice->HasKey(keys::kTtsVoicesEventTypes)) {
       const base::ListValue* event_types_list;
       if (!one_tts_voice->GetList(