Push API: use an enum to indicate status.

content/shell/renderer/test_runner/mock_web_push_client.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/shell/renderer/test_runner/mock_web_push_client.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "third_party/WebKit/public/platform/WebPushError.h"
 #include "third_party/WebKit/public/platform/WebPushRegistration.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 
 using blink::WebString;
 
 namespace content {
 
 MockWebPushClient::MockWebPushClient()
-  // The default state should be be an error with "Registration failed." message
-  // because LayoutTests are currently depending on that.
-  : error_message_("Registration failed.") {
+    : error_message_(
+          "Registration failed (default mock client error message)") {
 }
 
 MockWebPushClient::~MockWebPushClient() {}
 
 void MockWebPushClient::SetMockSuccessValues(
     const std::string& end_point, const std::string& registration_id) {
   end_point_ = end_point;
   registration_id_ = registration_id;
   error_message_ = "";
 }
@@ skipping 27 matching lines @@
     scoped_ptr<blink::WebPushRegistration> registration(
         new blink::WebPushRegistration(WebString::fromUTF8(end_point_),
                                        WebString::fromUTF8(registration_id_)));
     callbacks->onSuccess(registration.release());
   }
 
   delete callbacks;
 }
 
 }  // namespace content