Update from https://crrev.com/316786

gpu/command_buffer/tests/gl_test_utils.h

 // Copyright (c) 2012 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.
 
 // Helper functions for GL.
 
 #ifndef GPU_COMMAND_BUFFER_TESTS_GL_TEST_UTILS_H_
 #define GPU_COMMAND_BUFFER_TESTS_GL_TEST_UTILS_H_
 
 #include <GLES2/gl2.h>
 #include "base/basictypes.h"
 
 class GLTestHelper {
  public:
   static const uint8 kCheckClearValue = 123u;
 
   static bool HasExtension(const char* extension);
   static bool CheckGLError(const char* msg, int line);
 
   // Compiles a shader.
-  // Returns shader, 0 on failure..
+  // Does not check for errors, always returns shader.
+  static GLuint CompileShader(GLenum type, const char* shaderSrc);
+
+  // Compiles a shader and checks for compilation errors.
+  // Returns shader, 0 on failure.
   static GLuint LoadShader(GLenum type, const char* shaderSrc);
 
   // Attaches 2 shaders and links them to a program.
-  // Returns program, 0 on failure..
+  // 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);
 
   // Compiles 2 shaders, attaches and links them to a program
   // Returns program, 0 on failure.
   static GLuint LoadProgram(
       const char* vertex_shader_source,
       const char* fragment_shader_source);
 
   // Make a unit quad with position only.
   // Returns the created buffer.
   static GLuint SetupUnitQuad(GLint position_location);
 
   // Make a 6 vertex colors.
   // Returns the created buffer.
   static GLuint SetupColorsForUnitQuad(
       GLint location, const GLfloat color[4], GLenum usage);
 
   // Checks an area of pixels for a color.
   static bool CheckPixels(
       GLint x, GLint y, GLsizei width, GLsizei height, GLint tolerance,
       const uint8* color);
 
   // Uses ReadPixels to save an area of the current FBO/Backbuffer.
   static bool SaveBackbufferAsBMP(const char* filename, int width, int height);
 };
 
 #endif  // GPU_COMMAND_BUFFER_TESTS_GL_TEST_UTILS_H_