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 1362 matching lines @@
 }
 
 void MaybeAppendBlinkSettingsSwitchForFieldTrial(
     const base::CommandLine& browser_command_line,
     base::CommandLine* command_line) {
   // List of field trials that modify the blink-settings command line flag. No
   // two field trials in the list should specify the same keys, otherwise one
   // field trial may overwrite another. See Source/core/frame/Settings.in in
   // Blink for the list of valid keys.
   static const char* const kBlinkSettingsFieldTrials[] = {
-    // Keys: backgroundHtmlParserOutstandingTokenLimit
-    //       backgroundHtmlParserPendingTokenLimit
-    "BackgroundHtmlParserTokenLimits",
+      // Keys: backgroundHtmlParserOutstandingTokenLimit
+      //       backgroundHtmlParserPendingTokenLimit
+      "BackgroundHtmlParserTokenLimits",
 
-    // Keys: doHtmlPreloadScanning
-    "HtmlPreloadScanning",
+      // Keys: doHtmlPreloadScanning
+      "HtmlPreloadScanning",
 
-    // Keys: lowPriorityIframes
-    "LowPriorityIFrames",
+      // Keys: lowPriorityIframes
+      "LowPriorityIFrames",
 
-    // Keys: disallowFetchForDocWrittenScriptsInMainFrame
-    "DisallowFetchForDocWrittenScriptsInMainFrame",
+      // Keys: disallowFetchForDocWrittenScriptsInMainFrame
+      //       disallowFetchForDocWrittenScriptsInMainFrameOnSlowConnections
+      //       disallowFetchForDocWrittenScriptsInMainFrameIfEffectively2G
+      "DisallowFetchForDocWrittenScriptsInMainFrame",
 
-    // Keys: parseHTMLOnMainThreadSyncTokenize
-    //       parseHTMLOnMainThreadCoalesceChunks
-    "ParseHTMLOnMainThread",
+      // Keys: parseHTMLOnMainThreadSyncTokenize
+      //       parseHTMLOnMainThreadCoalesceChunks
+      "ParseHTMLOnMainThread",
 
-    // Keys: cssExternalScannerNoPreload
-    //       cssExternalScannerPreload
-    "CSSExternalScanner",
+      // Keys: cssExternalScannerNoPreload
+      //       cssExternalScannerPreload
+      "CSSExternalScanner",
   };
 
   std::vector<std::string> blink_settings;
   for (const char* field_trial_name : kBlinkSettingsFieldTrials) {
     // Each blink-settings field trial should include a forcing_flag group,
     // to make sure that clients that specify the blink-settings flag on the
     // command line are excluded from the experiment groups. To make
     // sure we assign clients that specify this flag to the forcing_flag
     // group, we must call GetVariationParams for each field trial first
     // (for example, before checking HasSwitch() and returning), since
@@ skipping 1766 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)