Turn off computation of the interest rect in cc in synchronized paint mode.

content/browser/gpu/compositor_util.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 "content/browser/gpu/compositor_util.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 147 matching lines @@
 }
 
 }  // namespace
 
 bool IsPropertyTreeVerificationEnabled() {
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
   return command_line.HasSwitch(cc::switches::kEnablePropertyTreeVerification);
 }
 
+bool IsBlinkSynchronizedPaintingEnabled() {
+  const base::CommandLine& command_line =
+      *base::CommandLine::ForCurrentProcess();
+  return command_line.HasSwitch(switches::kEnableBlinkSynchronizedPainting);
+}
+
 int NumberOfRendererRasterThreads() {
   int num_processors = base::SysInfo::NumberOfProcessors();
 
 #if defined(OS_ANDROID)
   // Android may report 6 to 8 CPUs for big.LITTLE configurations.
   // Limit the number of raster threads based on maximum of 4 big cores.
   num_processors = std::min(num_processors, 4);
 #endif
 
   int num_raster_threads = num_processors / 2;
@@ skipping 235 matching lines @@
     }
   }
   return problem_list;
 }
 
 std::vector<std::string> GetDriverBugWorkarounds() {
   return GpuDataManagerImpl::GetInstance()->GetDriverBugWorkarounds();
 }
 
 }  // namespace content