gpu: Add a new extension CHROMIUM_deschedule.

gpu/command_buffer/client/gles2_implementation_impl_autogen.h

 // 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.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 3057 matching lines @@
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glBindVertexArrayOES(" << array
                      << ")");
   if (IsVertexArrayReservedId(array)) {
     SetGLError(GL_INVALID_OPERATION, "BindVertexArrayOES", "array reserved id");
     return;
   }
   BindVertexArrayOESHelper(array);
   CheckGLError();
 }
 
+void GLES2Implementation::DescheduleUntilFinishedCHROMIUM() {
+  GPU_CLIENT_SINGLE_THREAD_CHECK();
+  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glDescheduleUntilFinishedCHROMIUM("
+                     << ")");
+  helper_->DescheduleUntilFinishedCHROMIUM();
+  CheckGLError();
+}
+
 void GLES2Implementation::GetTranslatedShaderSourceANGLE(GLuint shader,
                                                          GLsizei bufsize,
                                                          GLsizei* length,
                                                          char* source) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_VALIDATE_DESTINATION_OPTIONAL_INITALIZATION(GLsizei, length);
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glGetTranslatedShaderSourceANGLE"
                      << "(" << shader << ", " << bufsize << ", "
                      << static_cast<void*>(length) << ", "
                      << static_cast<void*>(source) << ")");
@@ skipping 387 matching lines @@
                      << ", " << static_cast<const void*>(default_value) << ")");
   size_t count = 16;
   for (size_t ii = 0; ii < count; ++ii)
     GPU_CLIENT_LOG("value[" << ii << "]: " << default_value[ii]);
   helper_->UniformMatrix4fvStreamTextureMatrixCHROMIUMImmediate(
       location, transpose, default_value);
   CheckGLError();
 }
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_IMPL_AUTOGEN_H_