gpu: Add YCbCr 420v extension.

ui/gl/test/gl_image_test_template.h

Index: ui/gl/test/gl_image_test_template.h
diff --git a/ui/gl/test/gl_image_test_template.h b/ui/gl/test/gl_image_test_template.h
index fc09d428bc7b0f5fbd79e0b866c06a068ed05ece..06bc8c20d35a92ee139d4becbf064284704d107a 100644
--- a/ui/gl/test/gl_image_test_template.h
+++ b/ui/gl/test/gl_image_test_template.h
@@ -17,6 +17,7 @@
 #include "ui/gfx/buffer_types.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
+#include "ui/gl/gl_helper.h"
 #include "ui/gl/gl_image.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_surface.h"
@@ -89,7 +90,7 @@ TYPED_TEST_CASE_P(GLImageCopyTest);
 
 TYPED_TEST_P(GLImageCopyTest, CopyTexImage) {
   const Size image_size(256, 256);
-  const uint8_t image_color[] = {0xff, 0xff, 0, 0xff};
+  const uint8_t image_color[] = {0x10, 0x20, 0, 0xff};

[reveman, 2015/10/29 22:08:04]

nit: can you add a comment here to explain why these values have been chosen.
less confusing that way if someone tries to change them and tests suddenly start
failing..

[Daniele Castagna, 2015/10/30 23:51:57]

Done.

   const uint8_t texture_color[] = {0, 0, 0xff, 0xff};
 
   GLuint framebuffer =
@@ -145,15 +146,14 @@ TYPED_TEST_P(GLImageCopyTest, CopyTexImage) {
   );
   // clang-format on
 
-  GLuint vertex_shader =
-      GLTestHelper::LoadShader(GL_VERTEX_SHADER, kVertexShader);
+  GLuint vertex_shader = GLHelper::LoadShader(GL_VERTEX_SHADER, kVertexShader);
   bool is_gles = GetGLImplementation() == kGLImplementationEGLGLES2;
-  GLuint fragment_shader = GLTestHelper::LoadShader(
+  GLuint fragment_shader = GLHelper::LoadShader(
       GL_FRAGMENT_SHADER,
       base::StringPrintf("%s%s", is_gles ? kShaderFloatPrecision : "",
                          kFragmentShader)
           .c_str());
-  GLuint program = GLTestHelper::SetupProgram(vertex_shader, fragment_shader);
+  GLuint program = GLHelper::SetupProgram(vertex_shader, fragment_shader);
   EXPECT_NE(program, 0u);
   glUseProgram(program);