Adds the speech recognition button to the app-list searchbox.

chrome/browser/ui/webui/app_list/start_page_handler.cc

Index: chrome/browser/ui/webui/app_list/start_page_handler.cc
diff --git a/chrome/browser/ui/webui/app_list/start_page_handler.cc b/chrome/browser/ui/webui/app_list/start_page_handler.cc
index 9de1d1816ba7feee49f02f9e7a3ec040927663b7..d352af8c36adc67dc2625c11a38fa6858231ffc0 100644
--- a/chrome/browser/ui/webui/app_list/start_page_handler.cc
+++ b/chrome/browser/ui/webui/app_list/start_page_handler.cc
@@ -67,6 +67,10 @@ void StartPageHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback(
       "search",
       base::Bind(&StartPageHandler::HandleSearch, base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
+      "setSpeechRecognitionState",
+      base::Bind(&StartPageHandler::HandleSpeechRecognition,
+                 base::Unretained(this)));
 }
 
 void StartPageHandler::OnRecommendedAppsChanged() {
@@ -128,4 +132,13 @@ void StartPageHandler::HandleSearch(const base::ListValue* args) {
   StartPageService::Get(Profile::FromWebUI(web_ui()))->OnSearch(query);
 }
 
+void StartPageHandler::HandleSpeechRecognition(const base::ListValue* args) {
+  bool recognizing;
+  CHECK(args->GetBoolean(0, &recognizing));
+
+  StartPageService* service =
+      StartPageService::Get(Profile::FromWebUI(web_ui()));
+  service->OnSpeechRecognitionStateChanged(recognizing);
+}
+
 }  // namespace app_list