gpu: Add YCbCr 420v extension.

ui/gl/gl_helper.h

 // Copyright 2015 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.
 
-#ifndef UI_GL_TEST_GL_TEST_HELPER_H_
-#define UI_GL_TEST_GL_TEST_HELPER_H_
+#ifndef UI_GL_GL_HELPER_H_
+#define UI_GL_GL_HELPER_H_
 
 #include "base/basictypes.h"
 #include "ui/gl/gl_bindings.h"
 
 namespace gfx {
 
-class GLTestHelper {
+class GL_EXPORT GLHelper {
  public:
-  // Creates a texture object.
-  // Does not check for errors, always returns texture.
-  static GLuint CreateTexture(GLenum target);
-
   // Compiles a shader.
   // Does not check for errors, always returns shader.
   static GLuint CompileShader(GLenum type, const char* src);
 
   // Compiles a shader and checks for compilation errors.
   // Returns shader, 0 on failure.
   static GLuint LoadShader(GLenum type, const char* src);
 
   // Attaches 2 shaders and links them to a program.
   // Does not check for errors, always returns program.
   static GLuint LinkProgram(GLuint vertex_shader, GLuint fragment_shader);
 
   // Attaches 2 shaders, links them to a program, and checks for errors.
   // Returns program, 0 on failure.
   static GLuint SetupProgram(GLuint vertex_shader, GLuint fragment_shader);
-
-  // Creates a framebuffer, attaches a color buffer, and checks for errors.
-  // Returns framebuffer, 0 on failure.
-  static GLuint SetupFramebuffer(int width, int height);
-
-  // Checks an area of pixels for a color.
-  static bool CheckPixels(GLint x,
-                          GLint y,
-                          GLsizei width,
-                          GLsizei height,
-                          const uint8_t expected_color[4]);
 };
 
 }  // namespace gfx
 
-#endif  // UI_GL_TEST_GL_TEST_HELPER_H_
+#endif  // UI_GL_GL_HELPER_H_