Preload scan external CSS for @import

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 1366 matching lines @@
     "HtmlPreloadScanning",
 
     // Keys: lowPriorityIframes
     "LowPriorityIFrames",
 
     // Keys: disallowFetchForDocWrittenScriptsInMainFrame
     "DisallowFetchForDocWrittenScriptsInMainFrame",
 
     // Keys: parseHTMLOnMainThreadSyncTokenize
     "ParseHTMLOnMainThread",
+
+    // 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 1659 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)