Update from https://crrev.com/312398

gpu/command_buffer/common/gles2_cmd_utils.cc

 // 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.
 
 // This file is here so other GLES2 related files can have a common set of
 // includes where appropriate.
 
 #include <sstream>
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
@@ skipping 804 matching lines @@
       return false;
     }
     getting_array_location = true;
   }
   *getting_array = getting_array_location;
   *element_index = index.ValueOrDie();
   *array_pos = open_pos;
   return true;
 }
 
+size_t GLES2Util::CalcClearBufferivDataCount(int buffer) {
+  switch (buffer) {
+    case GL_COLOR:
+      return 4;
+    case GL_STENCIL:
+      return 1;
+    default:
+      return 0;
+  }
+}
+
+size_t GLES2Util::CalcClearBufferfvDataCount(int buffer) {
+  switch (buffer) {
+    case GL_COLOR:
+      return 4;
+    case GL_DEPTH:
+      return 1;
+    default:
+      return 0;
+  }
+}
+
 namespace {
 
 // WebGraphicsContext3DCommandBufferImpl configuration attributes. Those in
 // the 16-bit range are the same as used by EGL. Those outside the 16-bit range
 // are unique to Chromium. Attributes are matched using a closest fit algorithm.
 
 // From <EGL/egl.h>.
 const int32 kAlphaSize       = 0x3021;  // EGL_ALPHA_SIZE
 const int32 kBlueSize        = 0x3022;  // EGL_BLUE_SIZE
 const int32 kGreenSize       = 0x3023;  // EGL_GREEN_SIZE
@@ skipping 133 matching lines @@
   }
 
   return true;
 }
 
 #include "gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu