DevTools: do not trigger autocomplete on deletion

Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2003 matching lines @@
             for (var lineNumber in this._updatedLines)
                 this._removeTextFromCompletionDictionary(this._updatedLines[lineNumber]);
             delete this._updatedLines;
         }
 
         var linesToUpdate = {};
         var singleCharInput = false;
         for (var changeIndex = 0; changeIndex < changes.length; ++changeIndex) {
             var changeObject = changes[changeIndex];
             singleCharInput = (changeObject.origin === "+input" && changeObject.text.length === 1 && changeObject.text[0].length === 1) ||
-                (changeObject.origin === "+delete" && changeObject.removed.length === 1 && changeObject.removed[0].length === 1);
+                (this._suggestBox && changeObject.origin === "+delete" && changeObject.removed.length === 1 && changeObject.removed[0].length === 1);
 
             var editInfo = this._textEditor._changeObjectToEditOperation(changeObject);
             for (var i = editInfo.newRange.startLine; i <= editInfo.newRange.endLine; ++i)
                 linesToUpdate[i] = this._textEditor.line(i);
         }
         for (var lineNumber in linesToUpdate)
             this._addTextToCompletionDictionary(linesToUpdate[lineNumber]);
 
         if (singleCharInput)
             this.autocomplete();
@@ skipping 347 matching lines @@
     var backgroundColorRule = backgroundColor ? ".CodeMirror .CodeMirror-selected { background-color: " + backgroundColor + ";}" : "";
     var foregroundColor = InspectorFrontendHost.getSelectionForegroundColor();
     var foregroundColorRule = foregroundColor ? ".CodeMirror .CodeMirror-selectedtext:not(.CodeMirror-persist-highlight) { color: " + foregroundColor + "!important;}" : "";
     if (!foregroundColorRule && !backgroundColorRule)
         return;
 
     var style = document.createElement("style");
     style.textContent = backgroundColorRule + foregroundColorRule;
     document.head.appendChild(style);
 })();