Handle keyboard shortcuts in Mac Panels.

chrome/app/nibs/Panel.xib

Index: chrome/app/nibs/Panel.xib
diff --git a/chrome/app/nibs/Panel.xib b/chrome/app/nibs/Panel.xib
index b84b375a8c8d8320aeb6e7255208dc3854dbddd9..f2a256154afd824bc1172d6537d5dd145c3782b6 100644
--- a/chrome/app/nibs/Panel.xib
+++ b/chrome/app/nibs/Panel.xib
@@ -12,8 +12,8 @@
 		</object>
 		<object class="NSMutableArray" key="IBDocument.EditedObjectIDs">
 			<bool key="EncodedWithXMLCoder">YES</bool>
-			<integer value="6"/>
 			<integer value="1"/>
+			<integer value="6"/>
 		</object>
 		<object class="NSArray" key="IBDocument.PluginDependencies">
 			<bool key="EncodedWithXMLCoder">YES</bool>
@@ -45,7 +45,7 @@
 				<string key="NSWindowRect">{{196, 240}, {480, 270}}</string>
 				<int key="NSWTFlags">544736256</int>
 				<string key="NSWindowTitle">Window</string>
-				<string key="NSWindowClass">NSWindow</string>
+				<string key="NSWindowClass">ChromeEventProcessingWindow</string>
 				<nil key="NSViewClass"/>
 				<string key="NSWindowContentMaxSize">{1.79769e+308, 1.79769e+308}</string>
 				<object class="NSView" key="NSWindowView" id="1006">
@@ -205,6 +205,14 @@
 			<object class="NSMutableArray" key="referencedPartialClassDescriptions">
 				<bool key="EncodedWithXMLCoder">YES</bool>
 				<object class="IBPartialClassDescription">
+					<string key="className">ChromeEventProcessingWindow</string>
+					<string key="superclassName">NSWindow</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier">
+						<string key="majorKey">IBUserSource</string>
+						<string key="minorKey"/>
+					</object>
+				</object>
+				<object class="IBPartialClassDescription">
 					<string key="className">FirstResponder</string>
 					<string key="superclassName">NSObject</string>
 					<object class="NSMutableDictionary" key="actions">