Remove unnecessary dependency from gpu/ to libui.dll

The command buffer uses ui/gfx/ types and ui/gl/ bindings, but those are
separate components from ui/ui.gyp:ui. libui.dll pulls in a bunch of dependencies
(like net/) that the command buffer doesn't need.

R=piman

Review URL: https://codereview.chromium.org/137203006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247966 0039d316-1c4b-4281-b951-d872f2087c98

gpu/command_buffer_service.gypi

@@ -19,7 +19,6 @@
     '../ui/gfx/gfx.gyp:gfx',
     '../ui/gfx/gfx.gyp:gfx_geometry',
     '../ui/gl/gl.gyp:gl',
-    '../ui/ui.gyp:ui',
     '<(angle_path)/src/build_angle.gyp:translator',
     '../third_party/khronos/khronos.gyp:khronos_headers',
     '../third_party/protobuf/protobuf.gyp:protobuf_lite',