Add Blink setting to block doc.written scripts on 2g-like networks

chrome/browser/chrome_content_browser_client.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 "chrome/browser/chrome_content_browser_client.h"
 
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
@@ skipping 1373 matching lines @@
     //       backgroundHtmlParserPendingTokenLimit
     "BackgroundHtmlParserTokenLimits",
 
     // Keys: doHtmlPreloadScanning
     "HtmlPreloadScanning",
 
     // Keys: lowPriorityIframes
     "LowPriorityIFrames",
 
     // Keys: disallowFetchForDocWrittenScriptsInMainFrame
+    //       disallowFetchForDocWrittenScriptsInMainFrameOnSlowConnections
+    //       disallowFetchForDocWrittenScriptsInMainFrameIfEffectively2G
     "DisallowFetchForDocWrittenScriptsInMainFrame",
 
     // Keys: parseHTMLOnMainThreadSyncTokenize
     //       parseHTMLOnMainThreadCoalesceChunks
     "ParseHTMLOnMainThread",
 
     // Keys: cssExternalScannerNoPreload
     //       cssExternalScannerPreload
     "CSSExternalScanner",
   };
@@ skipping 1764 matching lines @@
   if (channel <= kMaxDisableEncryptionChannel) {
     static const char* const kWebRtcDevSwitchNames[] = {
       switches::kDisableWebRtcEncryption,
     };
     to_command_line->CopySwitchesFrom(from_command_line,
                                       kWebRtcDevSwitchNames,
                                       arraysize(kWebRtcDevSwitchNames));
   }
 }
 #endif  // defined(ENABLE_WEBRTC)