Unit tests have been created for the GPUTiming.

ui/gl/gl_tests.gyp

Index: ui/gl/gl_tests.gyp
diff --git a/ui/gl/gl_tests.gyp b/ui/gl/gl_tests.gyp
index bd92444561c0d995d5065ae834d7522cdc9b286b..35e66cb73837144b3ceb45e292d8901ad2792452 100644
--- a/ui/gl/gl_tests.gyp
+++ b/ui/gl/gl_tests.gyp
@@ -12,13 +12,16 @@
       'type': '<(gtest_target_type)',
       'sources': [
         'test/run_all_unittests.cc',
+        'gpu_timing_unittest.cc',
         'gl_api_unittest.cc',
       ],
       'dependencies': [
         '<(DEPTH)/base/base.gyp:base',
         '<(DEPTH)/base/base.gyp:test_support_base',
+        '<(DEPTH)/testing/gmock.gyp:gmock',
         '<(DEPTH)/testing/gtest.gyp:gtest',
-        'gl.gyp:gl',
+        '<(DEPTH)/ui/gl/gl.gyp:gl',
+        '<(DEPTH)/ui/gl/gl.gyp:gl_unittest_utils',
       ],
       'conditions': [
         ['OS == "android"', {
@@ -30,9 +33,6 @@
           'sources': [
             'test/egl_initialization_displays_unittest.cc',
           ],
-          'dependencies': [
-            '<(DEPTH)/ui/gl/gl.gyp:gl',
-          ],
           'include_dirs': [
             '<(DEPTH)/third_party/khronos',

[no sievers, 2015/06/09 22:56:41]

nit: I thought you had already moved this out of the OS-block in another cl.

[David Yen, 2015/06/09 23:04:24]

Yes, that CL is still in the commit queue. I will wait for that to land to
ensure these merge properly.

           ],