DevTools: migrate from external Maps to symbols in the bindings objects.

third_party/WebKit/Source/devtools/front_end/bindings/BlackboxManager.js

 // Copyright 2014 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.
 /**
  * @implements {SDK.TargetManager.Observer}
  * @unrestricted
  */
 Bindings.BlackboxManager = class {
   /**
    * @param {!Bindings.DebuggerWorkspaceBinding} debuggerWorkspaceBinding
@@ skipping 304 matching lines @@
   _parsedScriptSource(event) {
     var script = /** @type {!SDK.Script} */ (event.data);
     this._addScript(script);
   }
 
   /**
    * @param {!SDK.Script} script
    * @return {!Promise<undefined>}
    */
   _addScript(script) {
+    if (!script.sourceURL && !script.sourceMapURL)
+      return Promise.resolve();
     var blackboxed = this._isBlackboxedScript(script);
     return this._setScriptState(script, blackboxed ? [{lineNumber: 0, columnNumber: 0}] : []);
   }
 
   /**
    * @param {!SDK.Script} script
    * @return {boolean}
    */
   _isBlackboxedScript(script) {
     return this.isBlackboxedURL(script.sourceURL, script.isContentScript());
@@ skipping 88 matching lines @@
       if (scheme === 'chrome-extension')
         prefix += parsedURL.host + '\\b';
       prefix += '.*';
     }
     return prefix + name.escapeForRegExp() + (url.endsWith(name) ? '$' : '\\b');
   }
 };
 
 /** @type {!Bindings.BlackboxManager} */
 Bindings.blackboxManager;