Revert "aw: Disable ipc command buffer by default"

android_webview/lib/main/aw_main_delegate.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 "android_webview/lib/main/aw_main_delegate.h"
 
 #include "android_webview/browser/aw_content_browser_client.h"
 #include "android_webview/browser/browser_view_renderer.h"
 #include "android_webview/browser/scoped_allow_wait_for_legacy_web_view_api.h"
 #include "android_webview/common/aw_descriptors.h"
@@ skipping 119 matching lines @@
     // TODO(gsennton) we should use
     // gin::IsolateHolder::kNativesFileName/kSnapshotFileName
     // here when those files have arch specific names http://crbug.com/455699
     CHECK(base::android::RegisterApkAssetWithGlobalDescriptors(
         kV8NativesDataDescriptor, kNativesFileName));
     CHECK(base::android::RegisterApkAssetWithGlobalDescriptors(
         kV8SnapshotDataDescriptor, kSnapshotFileName));
   }
 
   if (cl->HasSwitch(switches::kWebViewSandboxedRenderer)) {
-    cl->AppendSwitch(switches::kUseIpcCommandBuffer);
     cl->AppendSwitch(switches::kInProcessGPU);
     cl->AppendSwitchASCII(switches::kRendererProcessLimit, "1");
   }
 
   return false;
 }
 
 void AwMainDelegate::PreSandboxStartup() {
 #if defined(ARCH_CPU_ARM_FAMILY)
   // Create an instance of the CPU class to parse /proc/cpuinfo and cache
@@ skipping 96 matching lines @@
 #if defined(VIDEO_HOLE)
 content::ExternalVideoSurfaceContainer*
 AwMainDelegate::CreateExternalVideoSurfaceContainer(
     content::WebContents* web_contents) {
   return external_video_surface::ExternalVideoSurfaceContainerImpl::Create(
       web_contents);
 }
 #endif
 
 }  // namespace android_webview