Revert of ui: Add GLImage unit test framework.

ui/gl/test/gl_test_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_
-
-#include "base/basictypes.h"
-#include "ui/gl/gl_bindings.h"
-
-namespace gfx {
-
-class GLTestHelper {
- 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_