Add display_compositor unittests into components_unittests

components/display_compositor/yuv_readback_unittest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/json/json_reader.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/test/launcher/unit_test_launcher.h"
 #include "base/test/test_suite.h"
@@ skipping 455 matching lines @@
         output_frame->stride(media::VideoFrame::kVPlane), 2, output_xsize / 2,
         output_ysize / 2, &input_pixels, message + " V plane");
 
     gl_->DeleteTextures(1, &src_texture);
   }
 
   std::unique_ptr<gpu::GLInProcessContext> context_;
   gpu::gles2::GLES2Interface* gl_;
   std::unique_ptr<display_compositor::GLHelper> helper_;
   gfx::DisableNullDrawGLBindings enable_pixel_output_;
+  base::MessageLoop message_loop_;

[Fady Samuel, 2016/05/03 18:03:44]

Do we use this?

[Peng, 2016/05/03 18:10:36]

It is necessary for those tests.

 };
 
 TEST_F(YUVReadbackTest, YUVReadbackOptTest) {
   // This test uses the gpu.service/gpu_decoder tracing events to detect how
   // many scaling passes are actually performed by the YUV readback pipeline.
   StartTracing(TRACE_DISABLED_BY_DEFAULT(
       "gpu.service") "," TRACE_DISABLED_BY_DEFAULT("gpu_decoder"));
 
   TestYUVReadback(800, 400, 800, 400, 0, 0, 1, false, true,
                   display_compositor::GLHelper::SCALER_QUALITY_FAST);
@@ skipping 59 matching lines @@
 INSTANTIATE_TEST_CASE_P(
     ,
     YUVReadbackPixelTest,
     ::testing::Combine(
         ::testing::Bool(),
         ::testing::Bool(),
         ::testing::Range<unsigned int>(0, arraysize(kYUVReadbackSizes)),
         ::testing::Range<unsigned int>(0, arraysize(kYUVReadbackSizes))));
 
 }  // namespace display_compositor