Apply script preprocessor to Web page scripts only.

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 500 matching lines @@
                 'src/WebPluginContainerImpl.h',
                 'src/WebPluginDocument.cpp',
                 'src/WebPluginLoadObserver.cpp',
                 'src/WebPluginLoadObserver.h',
                 'src/WebPluginScrollbarImpl.cpp',
                 'src/WebPluginScrollbarImpl.h',
                 'src/WebPopupMenuImpl.cpp',
                 'src/WebPopupMenuImpl.h',
                 'src/WebRange.cpp',
                 'src/WebRuntimeFeatures.cpp',
+                'src/WebScopedCompilation.cpp',
                 'src/WebScopedMicrotaskSuppression.cpp',
                 'src/WebScopedUserGesture.cpp',
                 'src/WebScriptController.cpp',
                 'src/WebScrollbarThemeClientImpl.cpp',
                 'src/WebScrollbarThemeClientImpl.h',
                 'src/WebScrollbarThemePainter.cpp',
                 'src/WebSearchableFormData.cpp',
                 'src/WebSecurityOrigin.cpp',
                 'src/WebSecurityPolicy.cpp',
                 'src/WebSelectElement.cpp',
@@ skipping 301 matching lines @@
         ['clang==1', {
             'target_defaults': {
                 'cflags': ['-Wglobal-constructors'],
                 'xcode_settings': {
                     'WARNING_CFLAGS': ['-Wglobal-constructors'],
                 },
             },
         }],
     ], # conditions
 }