Split GCMDriver into platform-specific implementations

components/gcm_driver.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'gcm_driver',
       'type': 'static_library',
       'dependencies': [
@@ skipping 10 matching lines @@
         'gcm_driver/android/component_jni_registrar.h',
         'gcm_driver/default_gcm_app_handler.cc',
         'gcm_driver/default_gcm_app_handler.h',
         'gcm_driver/gcm_app_handler.h',
         'gcm_driver/gcm_client_factory.cc',
         'gcm_driver/gcm_client_factory.h',
         'gcm_driver/gcm_driver.cc',
         'gcm_driver/gcm_driver.h',
         'gcm_driver/gcm_driver_android.cc',
         'gcm_driver/gcm_driver_android.h',
+        'gcm_driver/gcm_driver_desktop.cc',
+        'gcm_driver/gcm_driver_desktop.h',
         'gcm_driver/system_encryptor.cc',
         'gcm_driver/system_encryptor.h',
       ],
       'conditions': [
         ['OS == "android"', {
           'dependencies': [
             'gcm_driver_jni_headers',
           ],
+          'sources!': [
+            'gcm_driver/gcm_driver_desktop.cc',
+            'gcm_driver/gcm_driver_desktop.h',
+          ],
         }],
       ],
     },
     {
       'target_name': 'gcm_driver_test_support',
       'type': 'static_library',
       'dependencies': [
         'gcm_driver',
         '../base/base.gyp:base',
         '../testing/gtest.gyp:gtest',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'gcm_driver/fake_gcm_app_handler.cc',
         'gcm_driver/fake_gcm_app_handler.h',
         'gcm_driver/fake_gcm_client.cc',
         'gcm_driver/fake_gcm_client.h',
         'gcm_driver/fake_gcm_client_factory.cc',
         'gcm_driver/fake_gcm_client_factory.h',
+        'gcm_driver/fake_gcm_driver.cc',
+        'gcm_driver/fake_gcm_driver.h',
       ],
     },    
   ],
   'conditions': [
     ['OS == "android"', {
       'targets': [
         {
           'target_name': 'gcm_driver_java',
           'type': 'none',
           'dependencies': [
@@ skipping 13 matching lines @@
           'variables': {
             'jni_gen_package': 'components/gcm_driver',
           },
           'includes': [ '../build/jni_generator.gypi' ],
         },
       ],
      },
     ],
   ],
 }