Implementation of WebCompositorSupport when use_libcc_for_compositor=1

webkit/glue/webkit_glue.gypi

Index: webkit/glue/webkit_glue.gypi
diff --git a/webkit/glue/webkit_glue.gypi b/webkit/glue/webkit_glue.gypi
index 6c7a448e30e8937853519282478c049be068ad17..c0f0a2c502afdba4ef4dd6594b86de1ca3dcc720 100644
--- a/webkit/glue/webkit_glue.gypi
+++ b/webkit/glue/webkit_glue.gypi
@@ -11,6 +11,8 @@
         'webkit_src_dir': '../../third_party/WebKit',
       }],
     ],
+
+    'use_libcc_for_compositor%': 0,
   },
   'target_defaults': {
      # Disable narrowing-conversion-in-initialization-list warnings in that we
@@ -140,6 +142,7 @@
         '<(DEPTH)/ui/gl/gl.gyp:gl',
         '<(DEPTH)/ui/ui.gyp:ui',
         '<(DEPTH)/v8/tools/gyp/v8.gyp:v8',
+        '<(DEPTH)/webkit/compositor/compositor.gyp:webkit_compositor_support',
         '<(webkit_src_dir)/Source/WebKit/chromium/WebKit.gyp:webkit',
         'blob',
         'fileapi',
@@ -537,6 +540,11 @@
             '<(DEPTH)/webkit/support/setup_third_party.gyp:third_party_headers',
           ],
         }],
+        ['use_libcc_for_compositor==1', {
+          'defines': [
+            'USE_LIBCC_FOR_COMPOSITOR',
+          ],
+        }],
       ],
     },
   ],