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

Source/devtools/front_end/cm/htmlembedded.js

+CodeMirror.defineMode("htmlembedded", function(config, parserConfig) {
+
+  //config settings
+  var scriptStartRegex = parserConfig.scriptStartRegex || /^<%/i,
+      scriptEndRegex = parserConfig.scriptEndRegex || /^%>/i;
+
+  //inner modes
+  var scriptingMode, htmlMixedMode;
+
+  //tokenizer when in html mode
+  function htmlDispatch(stream, state) {
+      if (stream.match(scriptStartRegex, false)) {
+          state.token=scriptingDispatch;
+          return scriptingMode.token(stream, state.scriptState);
+          }
+      else
+          return htmlMixedMode.token(stream, state.htmlState);
+    }
+
+  //tokenizer when in scripting mode
+  function scriptingDispatch(stream, state) {
+      if (stream.match(scriptEndRegex, false))  {
+          state.token=htmlDispatch;
+          return htmlMixedMode.token(stream, state.htmlState);
+         }
+      else
+          return scriptingMode.token(stream, state.scriptState);
+         }
+
+
+  return {
+    startState: function() {
+      scriptingMode = scriptingMode || CodeMirror.getMode(config, parserConfig.scriptingModeSpec);
+      htmlMixedMode = htmlMixedMode || CodeMirror.getMode(config, "htmlmixed");
+      return {
+          token :  parserConfig.startOpen ? scriptingDispatch : htmlDispatch,
+          htmlState : CodeMirror.startState(htmlMixedMode),
+          scriptState : CodeMirror.startState(scriptingMode)
+      };
+    },
+
+    token: function(stream, state) {
+      return state.token(stream, state);
+    },
+
+    indent: function(state, textAfter) {
+      if (state.token == htmlDispatch)
+        return htmlMixedMode.indent(state.htmlState, textAfter);
+      else if (scriptingMode.indent)
+        return scriptingMode.indent(state.scriptState, textAfter);
+    },
+
+    copyState: function(state) {
+      return {
+       token : state.token,
+       htmlState : CodeMirror.copyState(htmlMixedMode, state.htmlState),
+       scriptState : CodeMirror.copyState(scriptingMode, state.scriptState)
+      };
+    },
+
+    electricChars: "/{}:",
+
+    innerMode: function(state) {
+      if (state.token == scriptingDispatch) return {state: state.scriptState, mode: scriptingMode};
+      else return {state: state.htmlState, mode: htmlMixedMode};
+    }
+  };
+}, "htmlmixed");
+
+CodeMirror.defineMIME("application/x-ejs", { name: "htmlembedded", scriptingModeSpec:"javascript"});
+CodeMirror.defineMIME("application/x-aspx", { name: "htmlembedded", scriptingModeSpec:"text/x-csharp"});
+CodeMirror.defineMIME("application/x-jsp", { name: "htmlembedded", scriptingModeSpec:"text/x-java"});
+CodeMirror.defineMIME("application/x-erb", { name: "htmlembedded", scriptingModeSpec:"ruby"});