Remove Battery Status API support code from Blink

Source/WebKit/chromium/WebKit.gyp

 #
 # Copyright (C) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #         * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #         * Redistributions in binary form must reproduce the above
@@ skipping 58 matching lines @@
                 '<@(webcore_platform_support_files)',
                 'public/WebAccessibilityNotification.h',
                 'public/WebAccessibilityObject.h',
                 'public/WebAccessibilityRole.h',
                 'public/WebApplicationCacheHostClient.h',
                 'public/WebArrayBuffer.h',
                 'public/WebArrayBufferView.h',
                 'public/WebAudioSourceProvider.h',
                 'public/WebAudioSourceProviderClient.h',
                 'public/WebAutofillClient.h',
-                'public/WebBatteryStatus.h',
-                'public/WebBatteryStatusClient.h',
                 'public/WebBindings.h',
                 'public/WebBlob.h',
                 'public/WebCache.h',
                 'public/WebCachedURLRequest.h',
                 'public/WebColorChooser.h',
                 'public/WebColorChooserClient.h',
                 'public/WebColorName.h',
                 'public/WebCommonWorkerClient.h',
                 'public/WebCompositionUnderline.h',
                 'public/WebConsoleMessage.h',
@@ skipping 176 matching lines @@
                 'src/AssociatedURLLoader.cpp',
                 'src/AssociatedURLLoader.h',
                 'src/AsyncFileSystemChromium.cpp',
                 'src/AsyncFileSystemChromium.h',
                 'src/AsyncFileWriterChromium.cpp',
                 'src/AsyncFileWriterChromium.h',
                 'src/AutofillPopupMenuClient.cpp',
                 'src/AutofillPopupMenuClient.h',
                 'src/BackForwardClientImpl.cpp',
                 'src/BackForwardClientImpl.h',
-                'src/BatteryClientImpl.cpp',
-                'src/BatteryClientImpl.h',
                 'src/DateTimeChooserImpl.cpp',
                 'src/DateTimeChooserImpl.h',
                 'src/ChromeClientImpl.cpp',
                 'src/ChromeClientImpl.h',
                 'src/ColorChooserPopupUIController.cpp',
                 'src/ColorChooserPopupUIController.h',
                 'src/ColorChooserUIController.cpp',
                 'src/ColorChooserUIController.h',
                 'src/CompositionUnderlineBuilder.h',
                 'src/CompositionUnderlineVectorBuilder.cpp',
@@ skipping 486 matching lines @@
         ['clang==1', {
             'target_defaults': {
                 'cflags': ['-Wglobal-constructors'],
                 'xcode_settings': {
                     'WARNING_CFLAGS': ['-Wglobal-constructors'],
                 },
             },
         }],
     ], # conditions
 }