Remove the sender_id from the Push API code path.

chrome/browser/services/gcm/push_messaging_browsertest.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 <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "chrome/browser/infobars/infobar_service.h"
@@ skipping 104 matching lines @@
         browser()->tab_strip_model()->GetActiveWebContents()->GetMainFrame(),
         script,
         result);
   }
 
   bool RegisterServiceWorker(std::string* result) {
     return RunScript("registerServiceWorker()", result);
   }
 
   bool RegisterPush(std::string* result) {
-    return RunScript("registerPush('1234567890')", result);
+    return RunScript("registerPush()", result);
   }
 
   net::SpawnedTestServer* https_server() const { return https_server_.get(); }
 
   FakeGCMProfileService* gcm_service() const { return gcm_service_; }
 
  private:
   scoped_ptr<net::SpawnedTestServer> https_server_;
   FakeGCMProfileService* gcm_service_;
 
@@ skipping 23 matching lines @@
 
   InfoBarResponder cancelling_responder(browser(), false);
 
   std::string register_push_result;
   ASSERT_TRUE(RegisterPush(&register_push_result));
   EXPECT_EQ("AbortError - Registration failed - permission denied",
             register_push_result);
 }
 
 }  // namespace gcm