Merge ContentDistributor into ElementShadow

Source/core/core.gypi

 {
     'variables': {
         'deprecated_perl_core_idl_files': [
             'css/CSS.idl',
             'css/CSSCharsetRule.idl',
             'css/CSSFontFaceLoadEvent.idl',
             'css/CSSFontFaceRule.idl',
             'css/CSSHostRule.idl',
             'css/CSSImportRule.idl',
             'css/CSSMediaRule.idl',
@@ skipping 1987 matching lines @@
             'dom/WheelEvent.cpp',
             'dom/WheelEvent.h',
             'dom/WindowEventContext.cpp',
             'dom/WindowEventContext.h',
             'dom/default/PlatformMessagePortChannel.cpp',
             'dom/default/PlatformMessagePortChannel.h',
             'dom/default/chromium/PlatformMessagePortChannelChromium.cpp',
             'dom/default/chromium/PlatformMessagePortChannelChromium.h',
             'dom/shadow/ComposedShadowTreeWalker.cpp',
             'dom/shadow/ComposedShadowTreeWalker.h',
-            'dom/shadow/ContentDistributor.cpp',
-            'dom/shadow/ContentDistributor.h',
+            'dom/shadow/ContentDistribution.cpp',
+            'dom/shadow/ContentDistribution.h',
+            'dom/shadow/ScopeContentDistribution.cpp',
+            'dom/shadow/ScopeContentDistribution.h',
             'dom/shadow/ElementShadow.cpp',
             'dom/shadow/ElementShadow.h',
             'dom/shadow/InsertionPoint.cpp',
             'dom/shadow/InsertionPoint.h',
             'dom/shadow/SelectRuleFeatureSet.cpp',
             'dom/shadow/SelectRuleFeatureSet.h',
             'dom/shadow/ShadowRoot.cpp',
             'dom/shadow/ShadowRoot.h',
         ],
         'webcore_html_files': [
@@ skipping 1808 matching lines @@
                 'bison_exe': 'bison',
                 # We specify a preprocess so it happens locally and won't get
                 # distributed to goma.
                 # FIXME: /usr/bin/gcc won't exist on OSX forever. We want to
                 # use /usr/bin/clang once we require Xcode 4.x.
                 'preprocessor': '--preprocessor "/usr/bin/gcc -E -P -x c++"'
               }],
          ],
     }
 }