Added support for passing WindowOpenDisposition into BrowserInstantController::OpenURL() from the o…

chrome/browser/resources/local_omnibox_popup/local_omnibox_popup.js

Index: chrome/browser/resources/local_omnibox_popup/local_omnibox_popup.js
diff --git a/chrome/browser/resources/local_omnibox_popup/local_omnibox_popup.js b/chrome/browser/resources/local_omnibox_popup/local_omnibox_popup.js
index fa44d0edc374e3ba0fd596d61981c18da1c17050..05fd86e411944831556e2246b8f11b0220a268f9 100644
--- a/chrome/browser/resources/local_omnibox_popup/local_omnibox_popup.js
+++ b/chrome/browser/resources/local_omnibox_popup/local_omnibox_popup.js
@@ -2,6 +2,27 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// ==========================================================
+//  Enums.
+// ==========================================================
+/**
+ * Possible behaviors for navigateContentWindow.
+ * @enum {number}
+ * @private
+ */
+var WindowOpenDisposition_ = {
+  CURRENT_TAB: 1,
+  NEW_BACKGROUND_TAB: 2
+};
+
+/**
+ * The JavaScript button event value for a middle click.
+ * @type {number}
+ * @private
+ * @const
+ */
+var MIDDLE_MOUSE_BUTTON_ = 1;
+
 // =============================================================================
 //                               Util functions
 // =============================================================================
@@ -53,8 +74,8 @@ function addSuggestionToBox(suggestion, box, select) {
   contentsContainer.appendChild(contents);
   suggestionDiv.appendChild(contentsContainer);
   var restrictedId = suggestion.rid;
-  suggestionDiv.onclick = function() {
-    handleSuggestionClick(restrictedId);
+  suggestionDiv.onclick = function(event) {
+    handleSuggestionClick(restrictedId, event);
   };
 
   restrictedIds.push(restrictedId);
@@ -199,10 +220,15 @@ function appendSuggestionStyles() {
  * Handles suggestion clicks.
  * @param {integer} restrictedId The restricted id of the suggestion being
  *     clicked.
+ * @param {Event} event The native click event.
  */
-function handleSuggestionClick(restrictedId) {
+function handleSuggestionClick(restrictedId, event) {
   clearSuggestions();
-  getApiObjectHandle().navigateContentWindow(restrictedId);
+  var disposition = WindowOpenDisposition_.CURRENT_TAB;
+  if (event.button == MIDDLE_MOUSE_BUTTON_)
+    disposition = WindowOpenDisposition_.NEW_BACKGROUND_TAB;
+  getApiObjectHandle().navigateContentWindow(
+      restrictedId, disposition);
 }
 
 /**