Improve mobile device rotation behavior.

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 378 matching lines @@
                 'src/StorageAreaProxy.h',
                 'src/StorageQuotaChromium.cpp',
                 'src/StorageNamespaceProxy.cpp',
                 'src/StorageNamespaceProxy.h',
                 'src/TextFieldDecoratorImpl.h',
                 'src/TextFieldDecoratorImpl.cpp',
                 'src/UserMediaClientImpl.h',
                 'src/UserMediaClientImpl.cpp',
                 'src/ValidationMessageClientImpl.cpp',
                 'src/ValidationMessageClientImpl.h',
+                'src/ViewportAnchor.cpp',
+                'src/ViewportAnchor.h',
                 'src/WebTextCheckingCompletionImpl.h',
                 'src/WebTextCheckingCompletionImpl.cpp',
                 'src/WebTextCheckingResult.cpp',
                 'src/WebAccessibilityObject.cpp',
                 'src/WebArrayBuffer.cpp',
                 'src/WebArrayBufferView.cpp',
                 'src/WebBindings.cpp',
                 'src/WebBlob.cpp',
                 'src/WebBlobData.cpp',
                 'src/WebCache.cpp',
@@ skipping 419 matching lines @@
         ['clang==1', {
             'target_defaults': {
                 'cflags': ['-Wglobal-constructors'],
                 'xcode_settings': {
                     'WARNING_CFLAGS': ['-Wglobal-constructors'],
                 },
             },
         }],
     ], # conditions
 }