Automatically trigger installation of high-quality speech synthesis extension.

chrome/browser/extensions/component_loader.cc

Index: chrome/browser/extensions/component_loader.cc
diff --git a/chrome/browser/extensions/component_loader.cc b/chrome/browser/extensions/component_loader.cc
index 4d065c3104e4b9b40a2724b7647ff2b034ba61a8..ff9fc560421e5886e3b1a6bd37aeca4cb322f452 100644
--- a/chrome/browser/extensions/component_loader.cc
+++ b/chrome/browser/extensions/component_loader.cc
@@ -321,6 +321,11 @@ void ComponentLoader::AddNetworkSpeechSynthesisExtension() {
       base::FilePath(FILE_PATH_LITERAL("network_speech_synthesis")));
 }
 
+void ComponentLoader::AddChromeOsSpeechSynthesisExtension() {
+  Add(IDR_SPEECH_SYNTHESIS_MANIFEST,
+      base::FilePath(extension_misc::kSpeechSynthesisExtensionPath));
+}
+
 void ComponentLoader::AddWithName(int manifest_resource_id,
                                   const base::FilePath& root_directory,
                                   const std::string& name) {
@@ -560,6 +565,9 @@ void ComponentLoader::AddDefaultComponentExtensionsWithBackgroundPages(
   AddNetworkSpeechSynthesisExtension();
 #endif
 #endif  // defined(GOOGLE_CHROME_BUILD)
+#if defined(OS_CHROMEOS)
+  AddChromeOsSpeechSynthesisExtension();
+#endif  // defined(OS_CHROMEOS)
 }
 
 void ComponentLoader::UnloadComponent(ComponentExtensionInfo* component) {