Revert of DevTools: [CodeMirrro] defer autocomplete controller initialization

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 c4619484c530cdbadbaa6577a9ce7fde4e1f4c8d..f31409bdb0ffc421581eed6223b593f0ff5861b4 100644
--- a/Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js
+++ b/Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js
@@ -1961,12 +1961,17 @@
     this._changes = this._changes.bind(this);
     this._beforeChange = this._beforeChange.bind(this);
     this._blur = this._blur.bind(this);
+    this._codeMirror.on("scroll", this._onScroll);
+    this._codeMirror.on("cursorActivity", this._onCursorActivity);
+    this._codeMirror.on("changes", this._changes);
+    this._codeMirror.on("beforeChange", this._beforeChange);
+    this._codeMirror.on("blur", this._blur);
 
     this._additionalWordChars = WebInspector.CodeMirrorTextEditor._NoAdditionalWordChars;
     this._enabled = true;
 
     this._dictionary = dictionary;
-    this._initialized = false;
+    this._addTextToCompletionDictionary(this._textEditor.text());
 }
 
 WebInspector.CodeMirrorTextEditor.AutocompleteController.Dummy = new WebInspector.CodeMirrorTextEditor.DummyAutocompleteController();
@@ -1974,23 +1979,8 @@
 WebInspector.CodeMirrorTextEditor._CSSAdditionalWordChars = { ".": true, "-": true };
 
 WebInspector.CodeMirrorTextEditor.AutocompleteController.prototype = {
-    _initializeIfNeeded: function()
-    {
-        if (this._initialized)
-            return;
-        this._initialized = true;
-        this._codeMirror.on("scroll", this._onScroll);
-        this._codeMirror.on("cursorActivity", this._onCursorActivity);
-        this._codeMirror.on("changes", this._changes);
-        this._codeMirror.on("beforeChange", this._beforeChange);
-        this._codeMirror.on("blur", this._blur);
-        this._addTextToCompletionDictionary(this._textEditor.text());
-    },
-
     dispose: function()
     {
-        if (!this._initialized)
-            return;
         this._codeMirror.off("scroll", this._onScroll);
         this._codeMirror.off("cursorActivity", this._onCursorActivity);
         this._codeMirror.off("changes", this._changes);
@@ -2153,7 +2143,6 @@
 
     autocomplete: function()
     {
-        this._initializeIfNeeded();
         var dictionary = this._dictionary;
         if (this._codeMirror.somethingSelected()) {
             this.finishAutocomplete();