Reland of Extend CopyTextureCHROMIUM to more ES 3.0 texture formats.

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>
@@ skipping 46 matching lines @@
   // 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_t* color);
+                          const uint8_t* color,
+                          int channel_count = 4);
 
   // Uses ReadPixels to save an area of the current FBO/Backbuffer.
   static bool SaveBackbufferAsBMP(const char* filename, int width, int height);
 
   static void DrawTextureQuad(GLenum target, const gfx::Size& size);
 };
 
 #endif  // GPU_COMMAND_BUFFER_TESTS_GL_TEST_UTILS_H_