Add facitility for Global Keyboard shortcuts.

chrome/app/nibs/en.lproj/BrowserWindow.xib

 <?xml version="1.0" encoding="UTF-8"?>
 <archive type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="7.03">
         <data>
                 <int key="IBDocument.SystemTarget">1050</int>
                 <string key="IBDocument.SystemVersion">9J61</string>
                 <string key="IBDocument.InterfaceBuilderVersion">677</string>
                 <string key="IBDocument.AppKitVersion">949.46</string>
                 <string key="IBDocument.HIToolboxVersion">353.00</string>
                 <object class="NSMutableArray" key="IBDocument.EditedObjectIDs">
                         <bool key="EncodedWithXMLCoder">YES</bool>
+                        <integer value="56"/>
                         <integer value="1"/>
-                        <integer value="56"/>
                 </object>
                 <object class="NSArray" key="IBDocument.PluginDependencies">
                         <bool key="EncodedWithXMLCoder">YES</bool>
                         <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
                 </object>
                 <object class="NSMutableDictionary" key="IBDocument.Metadata">
                         <bool key="EncodedWithXMLCoder">YES</bool>
                         <object class="NSArray" key="dict.sortedKeys">
                                 <bool key="EncodedWithXMLCoder">YES</bool>
                         </object>
@@ skipping 11 matching lines @@
                         </object>
                         <object class="NSCustomObject" id="1004">
                                 <string key="NSClassName">NSApplication</string>
                         </object>
                         <object class="NSWindowTemplate" id="1005">
                                 <int key="NSWindowStyleMask">4367</int>
                                 <int key="NSWindowBacking">2</int>
                                 <string key="NSWindowRect">{{60, 229}, {750, 600}}</string>
                                 <int key="NSWTFlags">536872960</int>
                                 <string key="NSWindowTitle"/>
-                                <string key="NSWindowClass">NSWindow</string>
+                                <string key="NSWindowClass">ChromeBrowserWindowImpl</string>
                                 <nil key="NSViewClass"/>
                                 <string key="NSWindowContentMaxSize">{3.40282e+38, 3.40282e+38}</string>
                                 <string key="NSWindowContentMinSize">{400, 250}</string>
                                 <object class="NSView" key="NSWindowView" id="1006">
                                         <reference key="NSNextResponder"/>
                                         <int key="NSvFlags">256</int>
                                         <object class="NSMutableArray" key="NSSubviews">
                                                 <bool key="EncodedWithXMLCoder">YES</bool>
                                                 <object class="NSCustomView" id="1858870">
                                                         <reference key="NSNextResponder" ref="1006"/>
@@ skipping 245 matching lines @@
                                 <bool key="EncodedWithXMLCoder">YES</bool>
                                 <object class="IBPartialClassDescription">
                                         <string key="className">BrowserWindowController</string>
                                         <string key="superclassName">TabWindowController</string>
                                         <object class="IBClassDescriptionSource" key="sourceIdentifier">
                                                 <string key="majorKey">IBProjectSource</string>
                                                 <string key="minorKey">browser/cocoa/browser_window_controller.h</string>
                                         </object>
                                 </object>
                                 <object class="IBPartialClassDescription">
+                                        <string key="className">ChromeBrowserWindowImpl</string>
+                                        <string key="superclassName">NSWindow</string>
+                                        <object class="IBClassDescriptionSource" key="sourceIdentifier">
+                                                <string key="majorKey">IBProjectSource</string>
+                                                <string key="minorKey">browser/cocoa/browser_window_impl.h</string>
+                                        </object>
+                                </object>
+                                <object class="IBPartialClassDescription">
                                         <string key="className">FirstResponder</string>
                                         <string key="superclassName">NSObject</string>
                                         <object class="NSMutableDictionary" key="actions">
                                                 <string key="NS.key.0">commandDispatch:</string>
                                                 <string key="NS.object.0">id</string>
                                         </object>
                                         <object class="IBClassDescriptionSource" key="sourceIdentifier">
                                                 <string key="majorKey">IBUserSource</string>
                                                 <string key="minorKey"/>
                                         </object>
@@ skipping 34 matching lines @@
                                                 <string key="minorKey">browser/cocoa/tab_window_controller.h</string>
                                         </object>
                                 </object>
                         </object>
                 </object>
                 <int key="IBDocument.localizationMode">0</int>
                 <string key="IBDocument.LastKnownRelativeProjectPath">../../../chrome.xcodeproj</string>
                 <int key="IBDocument.defaultPropertyAccessControl">3</int>
         </data>
 </archive>