Refactor DrawTextureQuad and CheckPixels in gl_tests util

gpu/command_buffer/tests/gl_cube_map_texture_unittest.cc

 // 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.
 
 #include <GLES2/gl2.h>
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/command_line.h"
@@ skipping 92 matching lines @@
 
   glBindFramebuffer(GL_FRAMEBUFFER, framebuffer_id_);
   glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, cube_map_target,
                          texture_, 0);
   EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
 
   // Check that FB is complete.
   EXPECT_EQ(static_cast<GLenum>(GL_FRAMEBUFFER_COMPLETE),
             glCheckFramebufferStatus(GL_FRAMEBUFFER));
 
-  GLTestHelper::CheckPixels(0, 0, width_, width_, 0, pixels_);
+  GLTestHelper::CheckPixels(0, 0, width_, width_, 0, pixels_, nullptr);
   EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
 }
 
 
 TEST_P(GLCubeMapTextureTest, ReadPixelsFromIncompleteCubeTexture) {
   GLenum cube_map_target = GetParam();
 
   glBindTexture(GL_TEXTURE_CUBE_MAP, texture_);
   EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
 
@@ skipping 13 matching lines @@
   EXPECT_EQ(static_cast<GLenum>(GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT),
             glCheckFramebufferStatus(GL_FRAMEBUFFER));
   GLsizei size = width_ * width_ * 4;
   std::unique_ptr<uint8_t[]> pixels(new uint8_t[size]);
   glReadPixels(0, 0, width_, width_, GL_RGBA, GL_UNSIGNED_BYTE, pixels.get());
   EXPECT_EQ(static_cast<GLenum>(GL_INVALID_FRAMEBUFFER_OPERATION),
             glGetError());
 }
 
 }  // namespace gpu