Replace RenderArena with PartitionAlloc

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 1301 matching lines @@
             'rendering/LayoutState.cpp',
             'rendering/OrderIterator.cpp',
             'rendering/OrderIterator.h',
             'rendering/LayoutRepainter.cpp',
             'rendering/Pagination.cpp',
             'rendering/Pagination.h',
             'rendering/PointerEventsHitRules.cpp',
             'rendering/PointerEventsHitRules.h',
             'rendering/RenderApplet.cpp',
             'rendering/RenderApplet.h',
-            'rendering/RenderArena.cpp',
-            'rendering/RenderArena.h',
             'rendering/RenderBR.cpp',
             'rendering/RenderBlock.cpp',
             'rendering/RenderBlockLineLayout.cpp',
             'rendering/RenderBox.cpp',
             'rendering/RenderBoxModelObject.cpp',
             'rendering/RenderButton.cpp',
             'rendering/RenderButton.h',
             'rendering/RenderCombineText.cpp',
             'rendering/RenderCombineText.h',
             'rendering/RenderCounter.cpp',
@@ skipping 139 matching lines @@
             'rendering/RenderThemeChromiumMac.mm',
             'rendering/RenderThemeChromiumSkia.cpp',
             'rendering/RenderThemeChromiumSkia.h',
             'rendering/RenderThemeChromiumWin.cpp',
             'rendering/RenderThemeChromiumWin.h',
             'rendering/RenderTreeAsText.cpp',
             'rendering/RenderVideo.cpp',
             'rendering/RenderVideo.h',
             'rendering/RenderView.cpp',
             'rendering/RenderWidget.cpp',
-            'rendering/RenderWidgetProtector.h',
             'rendering/RenderWordBreak.cpp',
             'rendering/RenderWordBreak.h',
             'rendering/RootInlineBox.cpp',
             'rendering/ScrollBehavior.cpp',
             'rendering/TableLayout.h',
             'rendering/TrailingFloatsRootInlineBox.h',
             'rendering/VerticalPositionCache.h',
             'rendering/break_lines.cpp',
             'rendering/break_lines.h',
             'rendering/shapes/PolygonShape.cpp',
@@ skipping 1015 matching lines @@
             'html/track/TrackEvent.cpp',
             'html/track/WebVTTElement.cpp',
             'html/track/WebVTTElement.h',
             'html/track/WebVTTParser.cpp',
             'html/track/WebVTTParser.h',
             'html/track/WebVTTToken.h',
             'html/track/WebVTTTokenizer.cpp',
             'html/track/WebVTTTokenizer.h',
         ],
         'webcore_platform_files': [
-            'platform/Arena.cpp',
-            'platform/Arena.h',
             'platform/AsyncFileSystem.h',
             'platform/AsyncFileSystemCallbacks.h',
             'platform/CalculationValue.cpp',
             'platform/CalculationValue.h',
             'platform/Clock.cpp',
             'platform/Clock.h',
             'platform/ContentType.cpp',
             'platform/ContentType.h',
             'platform/ContextMenu.cpp',
             'platform/ContextMenuItem.cpp',
@@ skipping 1267 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++"'
               }],
          ],
     }
 }