Add a feature flag for network service and about:flags entry for it.

content/public/common/content_switches.h

 // 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.
 
 // Defines all the "content" command-line switches.
 
 #ifndef CONTENT_PUBLIC_COMMON_CONTENT_SWITCHES_H_
 #define CONTENT_PUBLIC_COMMON_CONTENT_SWITCHES_H_
 
 #include "build/build_config.h"
@@ skipping 114 matching lines @@
 CONTENT_EXPORT extern const char
     kEnableWebFontsInterventionV2SwitchValueDisabled[];
 CONTENT_EXPORT extern const char kEnableGpuAsyncWorkerContext[];
 CONTENT_EXPORT extern const char kEnableGpuMemoryBufferCompositorResources[];
 CONTENT_EXPORT extern const char kEnableGpuMemoryBufferVideoFrames[];
 CONTENT_EXPORT extern const char kGpuRasterizationMSAASampleCount[];
 CONTENT_EXPORT extern const char kEnableLowResTiling[];
 CONTENT_EXPORT extern const char kEnableLCDText[];
 CONTENT_EXPORT extern const char kEnableLogging[];
 CONTENT_EXPORT extern const char kEnableNetworkInformation[];
-CONTENT_EXPORT extern const char kEnableNetworkService[];
 CONTENT_EXPORT extern const char kDisableNv12DxgiVideo[];
 CONTENT_EXPORT extern const char kEnablePinch[];
 CONTENT_EXPORT extern const char kEnablePluginPlaceholderTesting[];
 CONTENT_EXPORT extern const char kEnablePreciseMemoryInfo[];
 CONTENT_EXPORT extern const char kEnablePrintBrowser[];
 CONTENT_EXPORT extern const char kEnableRGBA4444Textures[];
 CONTENT_EXPORT extern const char kEnableSandboxLogging[];
 extern const char kEnableSkiaBenchmarking[];
 CONTENT_EXPORT extern const char kEnableSlimmingPaintV2[];
 CONTENT_EXPORT extern const char kEnableSlimmingPaintInvalidation[];
@@ skipping 174 matching lines @@
 extern const char kEnableV2Sandbox[];
 extern const char kV2SandboxedEnabled[];
 #endif  // defined(OS_MACOSX)
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in
 // alphabetical order, or in one of the ifdefs (also in order in each section).
 
 }  // namespace switches
 
 #endif  // CONTENT_PUBLIC_COMMON_CONTENT_SWITCHES_H_