Refactor DrawTextureQuad and CheckPixels in gl_tests util

gpu/command_buffer/tests/gl_ext_blend_func_extended_unittest.cc

Index: gpu/command_buffer/tests/gl_ext_blend_func_extended_unittest.cc
diff --git a/gpu/command_buffer/tests/gl_ext_blend_func_extended_unittest.cc b/gpu/command_buffer/tests/gl_ext_blend_func_extended_unittest.cc
index 719ce2df68f6a56bf5acdcc0b18b248fb40fa5af..236ea45dfd0e3ef52f84d1ef2ad0161267ac0a93 100644
--- a/gpu/command_buffer/tests/gl_ext_blend_func_extended_unittest.cc
+++ b/gpu/command_buffer/tests/gl_ext_blend_func_extended_unittest.cc
@@ -187,8 +187,9 @@ class EXTBlendFuncExtendedDrawTest : public testing::TestWithParam<bool> {
                          GL_ONE_MINUS_SRC1_ALPHA_EXT>(kDst, kSrc, kSrc1, color);
 
     EXPECT_TRUE(GLTestHelper::CheckPixels(kWidth / 4, (3 * kHeight) / 4, 1, 1,
-                                          1, color));
-    EXPECT_TRUE(GLTestHelper::CheckPixels(kWidth - 1, 0, 1, 1, 1, color));
+                                          1, color, nullptr));
+    EXPECT_TRUE(
+        GLTestHelper::CheckPixels(kWidth - 1, 0, 1, 1, 1, color, nullptr));
   }
 
  protected: