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

content/public/common/content_switches.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 "build/build_config.h"
 #include "content/public/common/content_switches.h"
 #include "media/media_features.h"
 
 namespace switches {
 
@@ skipping 385 matching lines @@
 // tiles may be displayed during fast scrolls especially on slower devices.
 const char kEnableLowResTiling[] = "enable-low-res-tiling";
 
 // Force logging to be enabled.  Logging is disabled by default in release
 // builds.
 const char kEnableLogging[]                 = "enable-logging";
 
 // Enables the network information API.
 const char kEnableNetworkInformation[]      = "enable-network-information";
 
-// Enables the network service.
-const char kEnableNetworkService[] = "enable-network-service";
-
 // Disables the video decoder from drawing to an NV12 textures instead of ARGB.
 const char kDisableNv12DxgiVideo[] = "disable-nv12-dxgi-video";
 
 // Enables compositor-accelerated touch-screen pinch gestures.
 const char kEnablePinch[]                   = "enable-pinch";
 
 // Enables testing features of the Plugin Placeholder. For internal use only.
 const char kEnablePluginPlaceholderTesting[] =
     "enable-plugin-placeholder-testing";
 
@@ skipping 657 matching lines @@
 // The flag tells the sandbox initialization code inside Chrome that the sandbox
 // should already be enabled.
 // TODO(kerrnel): Remove this once the V2 sandbox migration is complete, as
 // processes will be assumed to run under the V2 sandbox.
 const char kV2SandboxedEnabled[] = "v2-sandbox-enabled";
 #endif  // defined(OS_MACOSX)
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches