Devtools: [WIP] Implement enhanced devtools extension language APIs

Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js

Index: Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js
diff --git a/Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js b/Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js
index a01ac5e079b1be234d130ac3d6b6208a6a4e499a..fef9b534c297456d5bb86583b728ba7b0cbe003c 100644
--- a/Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js
+++ b/Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js
@@ -956,6 +956,13 @@ WebInspector.CodeMirrorTextEditor.prototype = {
     },
 
     /**
+     * @return {string}
+     */
+    mimeType: function() {
+        return this._mimeType;
+    },
+
+    /**
      * @param {boolean} readOnly
      */
     setReadOnly: function(readOnly)
@@ -1058,15 +1065,22 @@ WebInspector.CodeMirrorTextEditor.prototype = {
     _contextMenu: function(event)
     {
         var contextMenu = new WebInspector.ContextMenu(event);
+        event.consume(true); //Consume event now to prevent document from handling the async menu
         var target = event.target.enclosingNodeOrSelfWithClass("CodeMirror-gutter-elt");
+        var prom;
         if (target)
-            this._delegate.populateLineGutterContextMenu(contextMenu, parseInt(target.textContent, 10) - 1);
+            prom = this._delegate.populateLineGutterContextMenu(contextMenu, parseInt(target.textContent, 10) - 1);
         else {
             var textSelection = this.selection();
-            this._delegate.populateTextAreaContextMenu(contextMenu, textSelection.startLine, textSelection.startColumn);
+            prom = this._delegate.populateTextAreaContextMenu(contextMenu, textSelection.startLine, textSelection.startColumn);
+        }
+
+        prom.then(showAsync, showAsync);
+        var _this = this;
+        function showAsync() {
+            contextMenu.appendApplicableItems(_this);
+            contextMenu.show();
         }
-        contextMenu.appendApplicableItems(this);
-        contextMenu.show();
     },
 
     /**
@@ -1537,6 +1551,14 @@ WebInspector.CodeMirrorTextEditor.prototype = {
     },
 
     /**
+     * @return {?string}
+     */
+    url: function()
+    {
+        return this._url;
+    },
+
+    /**
      * @param {number} line
      * @param {string} name
      * @param {?Object} value
@@ -2164,6 +2186,7 @@ WebInspector.TextEditorDelegate.prototype = {
     /**
      * @param {!WebInspector.ContextMenu} contextMenu
      * @param {number} lineNumber
+     * @return {!Promise}
      */
     populateLineGutterContextMenu: function(contextMenu, lineNumber) { },
 
@@ -2171,6 +2194,7 @@ WebInspector.TextEditorDelegate.prototype = {
      * @param {!WebInspector.ContextMenu} contextMenu
      * @param {number} lineNumber
      * @param {number} columnNumber
+     * @return {!Promise}
      */
     populateTextAreaContextMenu: function(contextMenu, lineNumber, columnNumber) { },