DevTools: Always construct CodeMirror explicitly, via "new"

Source/devtools/front_end/externs.js

Index: Source/devtools/front_end/externs.js
diff --git a/Source/devtools/front_end/externs.js b/Source/devtools/front_end/externs.js
index fa104564c44f0e9a4a24f7e110ef45babb0e7eaf..5bcbdcfba89fca8b489a0bd5a40e60eb5845a03f 100644
--- a/Source/devtools/front_end/externs.js
+++ b/Source/devtools/front_end/externs.js
@@ -34,18 +34,11 @@
 Event.prototype.isMetaOrCtrlForTest;
 
 /**
- * @constructor
- * @extends {KeyboardEvent}
- * @param {string} eventType
- * @param {!Object=} properties
- */
-window.KeyboardEvent = function(eventType, properties) {}
-
-/**
  * @type {number}
  */
 KeyboardEvent.DOM_KEY_LOCATION_NUMPAD;
 
+// FIXME: Remove after the Closure compiler roll.
 /** @param {*} message */
 function postMessage(message) {}
 
@@ -315,11 +308,23 @@ difflib.SequenceMatcher = function(baseText, newText) { }
 difflib.SequenceMatcher.prototype.get_opcodes = function() { return []; }
 
 /** @constructor */
-var CodeMirror = function() { }
+var Doc = function() { }
+Doc.prototype = {
+    /** @type {number} */
+    scrollLeft: 0,
+    /** @type {number} */
+    scrollTop: 0
+}
+
+/** @constructor */
+var CodeMirror = function(element, config) { }
 CodeMirror.on = function(obj, type, handler) { }
 CodeMirror.prototype = {
+    /** @type {!Doc} */
+    doc: null,
     addKeyMap: function(map) { },
     addLineClass: function(handle, where, cls) { },
+    /** @param {?Object=} options */
     addLineWidget: function(handle, node, options) { },
     /**
      * @param {string|!Object} spec
@@ -331,11 +336,17 @@ CodeMirror.prototype = {
     clearGutter: function(gutterID) { },
     clearHistory: function() { },
     clipPos: function(pos) { },
+    /** @param {string=} mode */
     coordsChar: function(coords, mode) { },
+    /** @param {string=} mode */
     cursorCoords: function(start, mode) { },
     defaultCharWidth: function() { },
     defaultTextHeight: function() { },
     deleteH: function(dir, unit) { },
+    /**
+     * @param {*=} to
+     * @param {*=} op
+     */
     eachLine: function(from, to, op) { },
     execCommand: function(cmd) { },
     extendSelection: function(from, to) { },
@@ -360,6 +371,7 @@ CodeMirror.prototype = {
     getLineNumber: function(line) { },
     getMode: function() { },
     getOption: function(option) { },
+    /** @param {*=} lineSep */
     getRange: function(from, to, lineSep) { },
     /**
      * @return {!{left: number, top: number, width: number, height: number, clientWidth: number, clientHeight: number}}
@@ -370,6 +382,7 @@ CodeMirror.prototype = {
     getSelections: function() { },
     getStateAfter: function(line) { },
     getTokenAt: function(pos) { },
+    /** @param {*=} lineSep */
     getValue: function(lineSep) { },
     getViewport: function() { },
     getWrapperElement: function() { },
@@ -405,8 +418,10 @@ CodeMirror.prototype = {
     removeLineClass: function(handle, where, cls) { },
     removeLineWidget: function(widget) { },
     removeOverlay: function(spec) { },
+    /** @param {*=} origin */
     replaceRange: function(code, from, to, origin) { },
     replaceSelection: function(code, collapse, origin) { },
+    /** @param {*=} margin */
     scrollIntoView: function(pos, margin) { },
     scrollTo: function(x, y) { },
     setBookmark: function(pos, options) { },
@@ -417,7 +432,11 @@ CodeMirror.prototype = {
     setLine: function(line, text) { },
     setOption: function(option, value) { },
     setSelection: function(anchor, head) { },
-    setSelections: function(selections) { },
+    /**
+     * @param {number=} primaryIndex
+     * @param {?Object=} config
+     */
+    setSelections: function(selections, primaryIndex, config) { },
     setSize: function(width, height) { },
     setValue: function(code) { },
     somethingSelected: function() { },
@@ -427,6 +446,7 @@ CodeMirror.prototype = {
 }
 /** @type {!{cursorDiv: Element}} */
 CodeMirror.prototype.display;
+/** @type {!Object} */
 CodeMirror.Pass;
 CodeMirror.showHint = function(codeMirror, hintintFunction) { };
 CodeMirror.commands = {};
@@ -439,9 +459,9 @@ CodeMirror.startState = function(mode) { };
 
 /** @constructor */
 CodeMirror.Pos = function(line, ch) { }
-/** type {number} */
+/** @type {number} */
 CodeMirror.Pos.prototype.line;
-/** type {number} */
+/** @type {number} */
 CodeMirror.Pos.prototype.ch;
 
 /** @constructor */