Add a button to open TalkBack settings in chrome://settings.

chrome/browser/ui/app_list/arc/arc_app_utils.cc

Index: chrome/browser/ui/app_list/arc/arc_app_utils.cc
diff --git a/chrome/browser/ui/app_list/arc/arc_app_utils.cc b/chrome/browser/ui/app_list/arc/arc_app_utils.cc
index 651bbb810361a9124fd6892fb53364398162094d..3131b01557a13fef650ab16100dd0e4078921f44 100644
--- a/chrome/browser/ui/app_list/arc/arc_app_utils.cc
+++ b/chrome/browser/ui/app_list/arc/arc_app_utils.cc
@@ -30,6 +30,7 @@ constexpr int kNexus5Height = 690;
 // Minimum required versions.
 constexpr int kMinVersion = 0;
 constexpr int kCanHandleResolutionMinVersion = 1;
+constexpr int kSendBroadcastMinVersion = 1;
 constexpr int kUninstallPackageMinVersion = 2;
 constexpr int kShowPackageInfoMinVersion = 5;
 constexpr int kRemoveIconMinVersion = 9;
@@ -227,6 +228,32 @@ bool LaunchApp(content::BrowserContext* context,
       ->LaunchAndRelease();
 }
 
+bool ShowTalkBackSettings() {
+  arc::ArcBridgeService* bridge_service = arc::ArcBridgeService::Get();
+  if (!bridge_service) {
+    VLOG(2) << "ARC bridge is not ready";
+    return false;
+  }
+
+  arc::mojom::IntentHelperInstance *intent_helper_instance =
+      bridge_service->intent_helper()->instance();
+  if (!intent_helper_instance) {
+    VLOG(2) << "ARC intent helper instance is not ready";
+    return false;
+  }
+  if (bridge_service->intent_helper()->version() < kSendBroadcastMinVersion) {
+    VLOG(2) << "ARC intent helper instance is too old";
+    return false;
+  }
+
+  intent_helper_instance->SendBroadcast(
+          "org.chromium.arc.intent_helper.SHOW_TALKBACK_SETTINGS",
+          "org.chromium.arc.intent_helper",
+          "org.chromium.arc.intent_helper.SettingsReceiver",
+          "{}");
+  return true;

[stevenjb, 2016/08/08 22:41:03]

Do we actually use the result anywhere? If not we should make this return void.

[yhanada, 2016/08/09 06:29:40]

Done.

+}
+
 bool CanHandleResolution(content::BrowserContext* context,
                          const std::string& app_id,
                          const gfx::Rect& rect,