[DevTools] Fix in AndroidBreakingUsbTest.TestDeviceBreaking

chrome/browser/devtools/device/usb/android_usb_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 <algorithm>
 
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/devtools/device/adb/mock_adb_server.h"
 #include "chrome/browser/devtools/device/devtools_android_bridge.h"
@@ skipping 611 matching lines @@
 
   void DeviceListChanged(
       const DevToolsAndroidBridge::RemoteDevices& devices) override {
     if (devices.size() > 0) {
       for (const auto& device : devices) {
         if (device->is_connected()) {
           ASSERT_EQ(kDeviceModel, device->model());
           ASSERT_EQ(kDeviceSerial, device->serial());
           adb_bridge_->RemoveDeviceListListener(this);
           callback_.Run();
+          break;
         }
       }
     }
   }
 
   DevToolsAndroidBridge* adb_bridge_;
   base::Closure callback_;
 };
 
 class MockCountListener : public DevToolsAndroidBridge::DeviceCountListener {
@@ skipping 180 matching lines @@
   runner_->Run();
   EXPECT_EQ(2, listener.invoked_);
   EXPECT_EQ(listener.invoked_ - 1, scheduler_invoked_);
 }
 
 IN_PROC_BROWSER_TEST_F(AndroidUsbTraitsTest, TestDeviceCounting) {
   MockCountListenerForCheckingTraits listener(adb_bridge_);
   adb_bridge_->AddDeviceCountListener(&listener);
   runner_->Run();
 }