cocoa: add some tab-manipulation menu items

chrome/app/nibs/MainMenu.xib

Index: chrome/app/nibs/MainMenu.xib
diff --git a/chrome/app/nibs/MainMenu.xib b/chrome/app/nibs/MainMenu.xib
index 4d8173917bae23f5c06c5a9390ed535169a94352..9c2b690a4e75a0544248ef9dacac3792d9dd5528 100644
--- a/chrome/app/nibs/MainMenu.xib
+++ b/chrome/app/nibs/MainMenu.xib
@@ -494,6 +494,25 @@ CA
                                     <action selector="commandDispatch:" target="-1" id="559"/>
                                 </connections>
                             </menuItem>
+                            <menuItem isSeparatorItem="YES" id="BWw-WB-k9Y"/>
+                            <menuItem title="^IDS_TAB_CXMENU_DUPLICATE" tag="34027" id="rsG-Hi-xbu">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="commandDispatch:" target="-1" id="AjB-PF-HrG"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="^IDS_TAB_CXMENU_AUDIO_MUTE_TAB" tag="35012" id="WVg-XQ-yLX">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="commandDispatch:" target="-1" id="LaZ-j6-0bg"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="^IDS_TAB_CXMENU_PIN_TAB" tag="35013" id="VlC-vo-Vrf">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="commandDispatch:" target="-1" id="ou5-3d-iUR"/>
+                                </connections>
+                            </menuItem>
                             <menuItem isSeparatorItem="YES" id="551"/>
                             <menuItem title="^IDS_SHOW_DOWNLOADS_MAC" tag="40012" keyEquivalent="J" id="550">
                                 <connections>
@@ -558,5 +577,6 @@ CA
                 <outlet property="helpMenu_" destination="106" id="667"/>
             </connections>
         </customObject>
+        <menuItem isSeparatorItem="YES" id="4Sz-Jh-Doh"/>
     </objects>
 </document>