DevTools: Use CodeMirror modes instead of highlight tokenizers

Source/devtools/devtools.gyp

Index: Source/devtools/devtools.gyp
diff --git a/Source/devtools/devtools.gyp b/Source/devtools/devtools.gyp
index 1eb4103cfc1d5f8f7e43014166e8bb5451d17c66..485cd8c5ad37d1bb4674273f50bee556d7261133 100644
--- a/Source/devtools/devtools.gyp
+++ b/Source/devtools/devtools.gyp
@@ -156,13 +156,9 @@
             'front_end/SimpleWorkspaceProvider.js',
             'front_end/SnippetStorage.js',
             'front_end/SoftContextMenu.js',
-            'front_end/SourceCSSTokenizer.js',
             'front_end/SourceFrame.js',
-            'front_end/SourceHTMLTokenizer.js',
-            'front_end/SourceJavaScriptTokenizer.js',
             'front_end/SourceMap.js',
             'front_end/SourceMapping.js',
-            'front_end/SourceTokenizer.js',
             'front_end/Spectrum.js',
             'front_end/SplitView.js',
             'front_end/StatusBarButton.js',
@@ -171,9 +167,7 @@
             'front_end/TabbedPane.js',
             'front_end/TestController.js',
             'front_end/TextEditor.js',
-            'front_end/TextEditorHighlighter.js',
             'front_end/TextRange.js',
-            'front_end/TextEditorModel.js',
             'front_end/TextPrompt.js',
             'front_end/TextUtils.js',
             'front_end/TimelineGrid.js',
@@ -324,12 +318,14 @@
 
         'devtools_codemirror_js_files': [
             'front_end/CodeMirrorTextEditor.js',
+            'front_end/CodeMirrorUtils.js',
             'front_end/cm/clike.js',
             'front_end/cm/closebrackets.js',
             'front_end/cm/codemirror.js',
             'front_end/cm/coffeescript.js',
             'front_end/cm/comment.js',
             'front_end/cm/css.js',
+            'front_end/cm/headlesscodemirror.js',
             'front_end/cm/htmlembedded.js',
             'front_end/cm/htmlmixed.js',
             'front_end/cm/javascript.js',