[Sync] Fix namespaces for the browser_sync component.

chrome/browser/extensions/api/signed_in_devices/signed_in_devices_api_unittest.cc

 // Copyright (c) 2013 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 "chrome/browser/extensions/api/signed_in_devices/signed_in_devices_api.h"
 
 #include <memory>
 #include <string>
 #include <vector>
 
@@ skipping 120 matching lines @@
 
   EXPECT_EQ(output2[0]->public_id(), public_id1);
   EXPECT_EQ(output2[1]->public_id(), public_id2);
 
   std::string public_id3 = output2[2]->public_id();
   EXPECT_FALSE(public_id3.empty());
   EXPECT_NE(public_id3, public_id1);
   EXPECT_NE(public_id3, public_id2);
 }
 
-class ProfileSyncServiceMockForExtensionTests:
-    public ProfileSyncServiceMock {
+class ProfileSyncServiceMockForExtensionTests
+    : public browser_sync::ProfileSyncServiceMock {
  public:
   explicit ProfileSyncServiceMockForExtensionTests(Profile* p)
       : ProfileSyncServiceMock(CreateProfileSyncServiceParamsForTest(p)) {}
   ~ProfileSyncServiceMockForExtensionTests() {}
 
   MOCK_METHOD0(Shutdown, void());
   MOCK_CONST_METHOD0(GetDeviceInfoTracker, DeviceInfoTracker*());
 };
 
 std::unique_ptr<KeyedService> CreateProfileSyncServiceMock(
@@ skipping 97 matching lines @@
       .WillOnce(Return(&device_tracker));
   EXPECT_CALL(*pss_mock, Shutdown());
 
   std::vector<std::unique_ptr<DeviceInfo>> output =
       GetAllSignedInDevices(extension()->id(), profile());
 
   EXPECT_TRUE(output.empty());
 }
 
 }  // namespace extensions