DevTools: [CodeMirror] Add syntax highlighting for some other languages.

Source/devtools/front_end/SourceMap.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 91 matching lines @@
      * @return {string|undefined}
      */
     sourceContent: function(sourceURL)
     {
         return this._sourceContentByURL[sourceURL];
     },
 
     /**
      * @param {string} sourceURL
      * @param {WebInspector.ResourceType} contentType
-     * @param {string=} mimeType
      * @return {WebInspector.ContentProvider}
      */
-    sourceContentProvider: function(sourceURL, contentType, mimeType)
+    sourceContentProvider: function(sourceURL, contentType)
     {
-        // FIXME: We should detect mime type automatically (e.g. based on file extension)
+        var lastIndexOfDot = sourceURL.lastIndexOf(".");
+        var extension = lastIndexOfDot !== -1 ? sourceURL.substr(lastIndexOfDot + 1) : "";
+        var mimeType = WebInspector.ResourceType.mimeTypesForExtensions[extension.toLowerCase()];
         var sourceContent = this.sourceContent(sourceURL);
-        var contentProvider;
         if (sourceContent)
-            return new WebInspector.StaticContentProvider(contentType, sourceContent);
+            return new WebInspector.StaticContentProvider(contentType, sourceContent, mimeType);
         return new WebInspector.CompilerSourceMappingContentProvider(sourceURL, contentType, mimeType);
     },
 
     /**
      * @param {SourceMapV3} mappingPayload
      */
     _parseMappingPayload: function(mappingPayload)
     {
         if (mappingPayload.sections)
             this._parseSections(mappingPayload.sections);
@@ skipping 193 matching lines @@
     },
 
     /**
      * @return {boolean}
      */
     hasNext: function()
     {
         return this._position < this._string.length;
     }
 }