ui/compositor: Provide its own 'in process' ContextProvider.

ui/compositor/compositor.gyp

Index: ui/compositor/compositor.gyp
diff --git a/ui/compositor/compositor.gyp b/ui/compositor/compositor.gyp
index 6959709f09ecce5b16dc6e7f818f4c3b6c384760..a034b77c43f93ffca229caa4a6ab3a4b21f6b69e 100644
--- a/ui/compositor/compositor.gyp
+++ b/ui/compositor/compositor.gyp
@@ -90,7 +90,6 @@
         '<(DEPTH)/cc/cc.gyp:cc',
         '<(DEPTH)/cc/cc.gyp:cc_surfaces',
         '<(DEPTH)/cc/cc_tests.gyp:cc_test_support',
-        '<(DEPTH)/gpu/blink/gpu_blink.gyp:gpu_blink',
         '<(DEPTH)/skia/skia.gyp:skia',
         '<(DEPTH)/testing/gtest.gyp:gtest',
         '<(DEPTH)/third_party/WebKit/public/blink.gyp:blink_minimal',
@@ -98,7 +97,6 @@
         '<(DEPTH)/ui/gfx/gfx.gyp:gfx',
         '<(DEPTH)/ui/gfx/gfx.gyp:gfx_geometry',
         '<(DEPTH)/ui/gl/gl.gyp:gl',
-        '<(DEPTH)/webkit/common/gpu/webkit_gpu.gyp:webkit_gpu',
         'compositor',
       ],
       'sources': [
@@ -108,6 +106,8 @@
         'test/draw_waiter_for_test.h',
         'test/in_process_context_factory.cc',
         'test/in_process_context_factory.h',
+        'test/in_process_context_provider.cc',
+        'test/in_process_context_provider.h',
         'test/layer_animator_test_controller.cc',
         'test/layer_animator_test_controller.h',
         'test/test_compositor_host.h',