Add "Cast..." menu item to macOS menu bar

chrome/app/nibs/MainMenu.xib

 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="5056" systemVersion="13F34" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none">
     <dependencies>
         <deployment version="1090" defaultVersion="1060" identifier="macosx"/>
         <development version="5100" identifier="xcode"/>
         <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="5056"/>
     </dependencies>
     <objects>
         <customObject id="-2" userLabel="File's Owner" customClass="BrowserCrApplication"/>
         <customObject id="-1" userLabel="First Responder" customClass="FirstResponder"/>
@@ skipping 138 matching lines @@
                                 <connections>
                                     <action selector="commandDispatch:" target="-1" id="645"/>
                                 </connections>
                             </menuItem>
                             <menuItem title="^IDS_PRINT_USING_SYSTEM_DIALOG_MAC" tag="35007" alternate="YES" keyEquivalent="p" id="694">
                                 <modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
                                 <connections>
                                     <action selector="commandDispatch:" target="-1" id="695"/>
                                 </connections>
                             </menuItem>
+                            <menuItem title="^IDS_MEDIA_ROUTER_MENU_ITEM_TITLE" tag="35011" id="OVr-QF-3s6">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="commandDispatch:" target="-1" id="i0s-9w-Djk"/>
+                                </connections>
+                            </menuItem>
                         </items>
                     </menu>
                 </menuItem>
                 <menuItem title="^IDS_EDIT_MENU_MAC" tag="36004" id="217">
                     <modifierMask key="keyEquivalentModifierMask"/>
                     <menu key="submenu" title="^IDS_EDIT_MENU_MAC" id="205">
                         <items>
                             <menuItem title="^IDS_EDIT_UNDO_MAC" tag="50144" keyEquivalent="z" id="207">
                                 <connections>
                                     <action selector="undo:" target="-1" id="223"/>
@@ skipping 372 matching lines @@
         </customObject>
         <customObject id="483" customClass="AppController">
             <connections>
                 <outlet property="closeTabMenuItem_" destination="450" id="623"/>
                 <outlet property="closeWindowMenuItem_" destination="73" id="622"/>
                 <outlet property="helpMenu_" destination="106" id="667"/>
             </connections>
         </customObject>
     </objects>
 </document>