command_buffer: Batch command processing to reduce handler overheads.

gpu/command_buffer/service/gpu_scheduler.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.
 
 #include "gpu/command_buffer/service/gpu_scheduler.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/debug/trace_event.h"
@@ skipping 60 matching lines @@
   error::Error error = error::kNoError;
   if (decoder_)
     decoder_->BeginDecoding();
   while (!parser_->IsEmpty()) {
     if (IsPreempted())
       break;
 
     DCHECK(IsScheduled());
     DCHECK(unschedule_fences_.empty());
 
-    error = parser_->ProcessCommand();
+    error = parser_->ProcessCommands(CommandParser::kParseCommandsSlice);
 
     if (error == error::kDeferCommandUntilLater) {
       DCHECK_GT(unscheduled_count_, 0);
       break;
     }
 
     // TODO(piman): various classes duplicate various pieces of state, leading
     // to needlessly complex update logic. It should be possible to simply
     // share the state across all of them.
     command_buffer_->SetGetOffset(static_cast<int32>(parser_->get()));
@@ skipping 209 matching lines @@
                                                base::Closure task_)
   : fence(fence_),
     issue_time(base::Time::Now()),
     task(task_) {
 }
 
 GpuScheduler::UnscheduleFence::~UnscheduleFence() {
 }
 
 }  // namespace gpu