DevTools: introduce uiSourceCode.mimeType() method

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

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 59 matching lines @@
   }
 
   /**
    * @param {!SDK.Script} script
    */
   _addStubUISourceCode(script) {
     var stubUISourceCode = this._stubProject.addContentProvider(
         script.sourceURL + ':sourcemap',
         Common.StaticContentProvider.fromString(
             script.sourceURL, Common.resourceTypes.Script,
-            '\n\n\n\n\n// Please wait a bit.\n// Compiled script is not shown while source map is being loaded!'));
+            '\n\n\n\n\n// Please wait a bit.\n// Compiled script is not shown while source map is being loaded!'),
+        'text/javascript');
     this._stubUISourceCodes.set(script, stubUISourceCode);
   }
 
   /**
    * @param {!SDK.Script} script
    */
   _removeStubUISourceCode(script) {
     var uiSourceCode = this._stubUISourceCodes.get(script);
     this._stubUISourceCodes.delete(script);
     this._stubProject.removeFile(uiSourceCode.url());
@@ skipping 171 matching lines @@
     script[Bindings.CompilerScriptMapping._frameIdSymbol] = frameId;
     var project = script.isContentScript() ? this._contentScriptsProject : this._regularProject;
     for (var sourceURL of sourceMap.sourceURLs()) {
       var uiSourceCode = project.uiSourceCodeForURL(sourceURL);
       if (uiSourceCode) {
         Bindings.NetworkProject.addFrameAttribution(uiSourceCode, frameId);
         continue;
       }
 
       var contentProvider = sourceMap.sourceContentProvider(sourceURL, Common.resourceTypes.SourceMapScript);
+      var mimeType = Common.ResourceType.mimeFromURL(sourceURL) || contentProvider.contentType().canonicalMimeType();
       var embeddedContent = sourceMap.embeddedContentByURL(sourceURL);
       var metadata =
           typeof embeddedContent === 'string' ? new Workspace.UISourceCodeMetadata(null, embeddedContent.length) : null;
       uiSourceCode = project.createUISourceCode(sourceURL, contentProvider.contentType());
       uiSourceCode[Bindings.CompilerScriptMapping._sourceMapSymbol] = sourceMap;
       Bindings.NetworkProject.setInitialFrameAttribution(uiSourceCode, frameId);
-      project.addUISourceCodeWithProvider(uiSourceCode, contentProvider, metadata);
+      project.addUISourceCodeWithProvider(uiSourceCode, contentProvider, metadata, mimeType);
       this._debuggerWorkspaceBinding.setSourceMapping(this._debuggerModel, uiSourceCode, this);
     }
     this._debuggerWorkspaceBinding.updateLocations(script);
   }
 
   /**
    * @override
    * @return {boolean}
    */
   isIdentity() {
@@ skipping 16 matching lines @@
   dispose() {
     Common.EventTarget.removeEventListeners(this._eventListeners);
     this._regularProject.dispose();
     this._contentScriptsProject.dispose();
     this._stubProject.dispose();
   }
 };
 
 Bindings.CompilerScriptMapping._frameIdSymbol = Symbol('Bindings.CompilerScriptMapping._frameIdSymbol');
 Bindings.CompilerScriptMapping._sourceMapSymbol = Symbol('Bindings.CompilerScriptMapping._sourceMapSymbol');