gpu: Add GpuFence framework.

gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc

 // Copyright (c) 2016 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_passthrough.h"
 
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "ui/gl/gl_version_info.h"
 
@@ skipping 150 matching lines @@
   if (!feature_info_->feature_flags().angle_robust_client_memory ||
       !feature_info_->feature_flags().chromium_bind_generates_resource ||
       (feature_info_->IsWebGLContext() !=
        feature_info_->feature_flags().angle_webgl_compatibility)) {
     Destroy(true);
     return false;
   }
 
   image_manager_.reset(new ImageManager());
 
+  fence_manager_.reset(new FenceManager());
+
   bind_generates_resource_ = group_->bind_generates_resource();
 
   resources_ = group_->passthrough_resources();
 
   mailbox_manager_ = group_->mailbox_manager();
 
   // Query information about the texture units
   GLint num_texture_units = 0;
   glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &num_texture_units);
 
   active_texture_unit_ = 0;
   bound_textures_.resize(num_texture_units, 0);
 
   if (group_->gpu_preferences().enable_gpu_driver_debug_logging &&
       feature_info_->feature_flags().khr_debug) {
     InitializeGLDebugLogging();
   }
 
   set_initialized();
   return true;
 }
 
 void GLES2DecoderPassthroughImpl::Destroy(bool have_context) {
   image_manager_.reset();
 
+  if (fence_manager_.get()) {
+    fence_manager_->Destroy(have_context);
+    fence_manager_.reset();
+  }
+
   DeleteServiceObjects(
       &framebuffer_id_map_, have_context,
       [](GLuint framebuffer) { glDeleteFramebuffersEXT(1, &framebuffer); });
   DeleteServiceObjects(&transform_feedback_id_map_, have_context,
                        [](GLuint transform_feedback) {
                          glDeleteTransformFeedbacks(1, &transform_feedback);
                        });
   DeleteServiceObjects(&query_id_map_, have_context,
                        [](GLuint query) { glDeleteQueries(1, &query); });
   DeleteServiceObjects(
@@ skipping 205 matching lines @@
 
 gpu::gles2::VertexArrayManager*
 GLES2DecoderPassthroughImpl::GetVertexArrayManager() {
   return nullptr;
 }
 
 gpu::gles2::ImageManager* GLES2DecoderPassthroughImpl::GetImageManager() {
   return image_manager_.get();
 }
 
+gpu::gles2::FenceManager* GLES2DecoderPassthroughImpl::GetFenceManager() {
+  return fence_manager_.get();
+}
+
 bool GLES2DecoderPassthroughImpl::HasPendingQueries() const {
   return false;
 }
 
 void GLES2DecoderPassthroughImpl::ProcessPendingQueries(bool did_finish) {}
 
 bool GLES2DecoderPassthroughImpl::HasMoreIdleWork() const {
   return false;
 }
 
@@ skipping 108 matching lines @@
   }, /* NOLINT */
 
 const GLES2DecoderPassthroughImpl::CommandInfo
     GLES2DecoderPassthroughImpl::command_info[] = {
         GLES2_COMMAND_LIST(GLES2_CMD_OP)};
 
 #undef GLES2_CMD_OP
 
 }  // namespace gles2
 }  // namespace gpu