Update from https://crrev.com/304121

gpu/command_buffer/service/gles2_cmd_decoder_unittest_framebuffers.cc

 // Copyright 2014 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 "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
@@ skipping 754 matching lines @@
       // second check is after BufferData, simulate fail here
       .WillOnce(Return(GL_INVALID_OPERATION))
       // third error check is fall-through call to sync ReadPixels
       .WillOnce(Return(GL_NO_ERROR))
       .RetiresOnSaturation();
 
   EXPECT_CALL(*gl_,
               ReadPixels(0, 0, kWidth, kHeight, GL_RGB, GL_UNSIGNED_BYTE, _))
       .Times(1);
   EXPECT_CALL(*gl_, GenBuffersARB(1, _)).Times(1);
+  EXPECT_CALL(*gl_, DeleteBuffersARB(1, _)).Times(1);
   EXPECT_CALL(*gl_, BindBuffer(GL_PIXEL_PACK_BUFFER_ARB, _)).Times(2);
   EXPECT_CALL(*gl_,
               BufferData(GL_PIXEL_PACK_BUFFER_ARB, _, NULL, GL_STREAM_READ))
       .Times(1);
 
   ReadPixels cmd;
   cmd.Init(0,
            0,
            kWidth,
            kHeight,
@@ skipping 1609 matching lines @@
   EXPECT_EQ(1, result->GetNumResults());
   EXPECT_EQ(GL_NO_ERROR, GetGLError());
 }
 
 // TODO(gman): PixelStorei
 
 // TODO(gman): SwapBuffers
 
 }  // namespace gles2
 }  // namespace gpu