chromeos: Add NoteTakingHelper class.

chrome/browser/ui/ash/chrome_screenshot_grabber.cc

Index: chrome/browser/ui/ash/chrome_screenshot_grabber.cc
diff --git a/chrome/browser/ui/ash/chrome_screenshot_grabber.cc b/chrome/browser/ui/ash/chrome_screenshot_grabber.cc
index 37a9bd431b011dc669c0c2ff22f1f1f3c6c2dc1c..9ba9b8ac1398e1acb89f5783096d1adef5867bd1 100644
--- a/chrome/browser/ui/ash/chrome_screenshot_grabber.cc
+++ b/chrome/browser/ui/ash/chrome_screenshot_grabber.cc
@@ -21,7 +21,7 @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/browser/chromeos/file_manager/open_util.h"
-#include "chrome/browser/chromeos/note_taking_app_utils.h"
+#include "chrome/browser/chromeos/note_taking_helper.h"
 #include "chrome/browser/download/download_prefs.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/browser/notifications/notifier_state_tracker.h"
@@ -136,8 +136,9 @@ class ScreenshotGrabberNotificationDelegate : public NotificationDelegate {
         break;
       }
       case BUTTON_ANNOTATE: {
-        if (chromeos::IsNoteTakingAppAvailable(profile_)) {
-          chromeos::LaunchNoteTakingAppForNewNote(profile_, screenshot_path_);
+        chromeos::NoteTakingHelper* helper = chromeos::NoteTakingHelper::Get();
+        if (helper->IsAppAvailable(profile_)) {
+          helper->LaunchAppForNewNote(profile_, screenshot_path_);
           content::RecordAction(base::UserMetricsAction("Screenshot_Annotate"));
         }
         break;
@@ -437,7 +438,7 @@ Notification* ChromeScreenshotGrabber::CreateNotification(
         IDR_NOTIFICATION_SCREENSHOT_COPY_TO_CLIPBOARD);
     optional_field.buttons.push_back(copy_button);
 
-    if (chromeos::IsNoteTakingAppAvailable(GetProfile())) {
+    if (chromeos::NoteTakingHelper::Get()->IsAppAvailable(GetProfile())) {
       message_center::ButtonInfo annotate_button(l10n_util::GetStringUTF16(
           IDS_MESSAGE_CENTER_NOTIFICATION_BUTTON_ANNOTATE_SCREENSHOT));
       annotate_button.icon =