Add Protobuf support in cc for gfx objects

cc/cc_tests.gyp

Index: cc/cc_tests.gyp
diff --git a/cc/cc_tests.gyp b/cc/cc_tests.gyp
index 419f68cd7ad36569ffe6d488de014a2f10b0c626..6542f0f655d050763ab0d88e4b43829c2227c656 100644
--- a/cc/cc_tests.gyp
+++ b/cc/cc_tests.gyp
@@ -84,6 +84,7 @@
       'playback/display_item_list_unittest.cc',
       'playback/display_list_raster_source_unittest.cc',
       'playback/display_list_recording_source_unittest.cc',
+      'proto/gfx_conversions_unittest.cc',
       'quads/draw_polygon_unittest.cc',
       'quads/draw_quad_unittest.cc',
       'quads/render_pass_unittest.cc',
@@ -286,10 +287,12 @@
         '../skia/skia.gyp:skia',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
+        '../third_party/protobuf/protobuf.gyp:protobuf_lite',
         '../ui/events/events.gyp:events_base',
         '../ui/gfx/gfx.gyp:gfx',
         '../ui/gfx/gfx.gyp:gfx_geometry',
         'cc.gyp:cc',
+        'cc.gyp:cc_proto',
         'cc.gyp:cc_surfaces',
         'cc_test_support',
       ],