Rework compositor touch hit testing

Source/core/core.gypi

 {
     'variables': {
         '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 3583 matching lines @@
             'svg/graphics/filters/SVGFilterBuilder.cpp',
             'svg/graphics/filters/SVGFilterBuilder.h',
             'svg/properties/SVGAttributeToPropertyMap.cpp',
             'svg/properties/SVGAnimatedPathSegListPropertyTearOff.h',
             'svg/properties/SVGPathSegListPropertyTearOff.cpp',
         ],
         'webcore_test_support_idl_files': [
           'testing/Internals.idl',
           'testing/InternalProfilers.idl',
           'testing/InternalSettings.idl',
+          'testing/LayerRect.idl',
+          'testing/LayerRectList.idl',
           'testing/MallocStatistics.idl',
           'testing/TypeConversions.idl',
           '<(SHARED_INTERMEDIATE_DIR)/webkit/InternalSettingsGenerated.idl',
           '<(SHARED_INTERMEDIATE_DIR)/webkit/InternalRuntimeFlags.idl',
         ],
         'webcore_test_support_files': [
             'testing/v8/WebCoreTestSupport.cpp',
             'testing/v8/WebCoreTestSupport.h',
             'testing/InspectorFrontendClientLocal.cpp',
             'testing/InspectorFrontendClientLocal.h',
             'testing/Internals.cpp',
             'testing/Internals.h',
             'testing/InternalProfilers.cpp',
             'testing/InternalProfilers.h',
             'testing/InternalSettings.cpp',
             'testing/InternalSettings.h',
+            'testing/LayerRect.h',
+            'testing/LayerRectList.cpp',
+            'testing/LayerRectList.h',
             'testing/MallocStatistics.h',
             'testing/MockPagePopupDriver.cpp',
             'testing/MockPagePopupDriver.h',
             'testing/TypeConversions.h',
             '<(SHARED_INTERMEDIATE_DIR)/webkit/InternalSettingsGenerated.cpp',
             '<(SHARED_INTERMEDIATE_DIR)/webkit/InternalSettingsGenerated.h',
         ],
         'webcore_platform_support_files': [
             'platform/chromium/support/Platform.cpp',
             'platform/chromium/support/WebActiveGestureAnimation.cpp',
@@ skipping 94 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++"'
               }],
          ],
     }
 }