Add Drive connection status info to chrome:drive-internals.

chrome/browser/ui/webui/chromeos/drive_internals_ui.cc

Index: chrome/browser/ui/webui/chromeos/drive_internals_ui.cc
diff --git a/chrome/browser/ui/webui/chromeos/drive_internals_ui.cc b/chrome/browser/ui/webui/chromeos/drive_internals_ui.cc
index 3e261d048d3448ba073fca8bf13b0776cb153009..4b03612ec820c6eb6a9412807d827e751691f0fe 100644
--- a/chrome/browser/ui/webui/chromeos/drive_internals_ui.cc
+++ b/chrome/browser/ui/webui/chromeos/drive_internals_ui.cc
@@ -226,7 +226,7 @@ class DriveInternalsWebUIHandler : public content::WebUIMessageHandler {
   // Updates respective sections.
   void UpdateDriveRelatedFlagsSection();
   void UpdateDriveRelatedPreferencesSection();
-  void UpdateAuthStatusSection(
+  void UpdateConnectionStatusSection(
       drive::DriveServiceInterface* drive_service);
   void UpdateAboutResourceSection(
       drive::DriveServiceInterface* drive_service);
@@ -427,7 +427,7 @@ void DriveInternalsWebUIHandler::OnPageLoaded(const base::ListValue* args) {
 
   UpdateDriveRelatedFlagsSection();
   UpdateDriveRelatedPreferencesSection();
-  UpdateAuthStatusSection(drive_service);
+  UpdateConnectionStatusSection(drive_service);
   UpdateAboutResourceSection(drive_service);
   UpdateAppListSection(drive_service);
   UpdateLocalMetadataSection(debug_info_collector);
@@ -496,17 +496,37 @@ void DriveInternalsWebUIHandler::UpdateDriveRelatedPreferencesSection() {
                                    preferences);
 }
 
-void DriveInternalsWebUIHandler::UpdateAuthStatusSection(
+void DriveInternalsWebUIHandler::UpdateConnectionStatusSection(
     drive::DriveServiceInterface* drive_service) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(drive_service);
 
-  base::DictionaryValue auth_status;
-  auth_status.SetBoolean("has-refresh-token",
-                         drive_service->HasRefreshToken());
-  auth_status.SetBoolean("has-access-token",
-                         drive_service->HasAccessToken());
-  web_ui()->CallJavascriptFunction("updateAuthStatus", auth_status);
+  std::string status;
+  switch (drive::util::GetDriveConnectionStatus(Profile::FromWebUI(web_ui()))) {
+    case drive::util::DRIVE_DISCONNECTED_NOSERVICE:
+      status = "no service";
+      break;
+    case drive::util::DRIVE_DISCONNECTED_NONETWORK:
+      status = "no network";
+      break;
+    case drive::util::DRIVE_DISCONNECTED_NOTREADY:
+      status = "not ready";
+      break;
+    case drive::util::DRIVE_CONNECTED_METERED:
+      status = "metered";
+      break;
+    case drive::util::DRIVE_CONNECTED:
+      status = "connected";
+      break;
+  }
+
+  base::DictionaryValue connection_status;
+  connection_status.SetString("status", status);
+  connection_status.SetBoolean("has-refresh-token",
+                               drive_service->HasRefreshToken());
+  connection_status.SetBoolean("has-access-token",
+                               drive_service->HasAccessToken());
+  web_ui()->CallJavascriptFunction("updateConnectionStatus", connection_status);
 }
 
 void DriveInternalsWebUIHandler::UpdateAboutResourceSection(