RenderWidget popup should be a NSWindow so it can go outside the main window.

chrome/browser/chrome_browser_application_mac.mm

Index: chrome/browser/chrome_browser_application_mac.mm
diff --git a/chrome/browser/chrome_browser_application_mac.mm b/chrome/browser/chrome_browser_application_mac.mm
index e21f02fd91848c09dbb15601f758328b3e88ed07..f70c3c82d8673433548469a5e8df41d66213da00 100644
--- a/chrome/browser/chrome_browser_application_mac.mm
+++ b/chrome/browser/chrome_browser_application_mac.mm
@@ -232,7 +232,6 @@ void SwizzleInit() {
 - (id)init {
   SwizzleInit();
   if ((self = [super init])) {
-    eventHooks_.reset([[NSMutableArray alloc] init]);
   }
 
   // Sanity check to alert if overridden methods are not supported.
@@ -413,14 +412,6 @@ void SwizzleInit() {
   return [super sendAction:anAction to:aTarget from:sender];
 }
 
-- (void)addEventHook:(id<CrApplicationEventHookProtocol>)handler {
-  [eventHooks_ addObject:handler];
-}
-
-- (void)removeEventHook:(id<CrApplicationEventHookProtocol>)handler {
-  [eventHooks_ removeObject:handler];
-}
-
 - (BOOL)isHandlingSendEvent {
   return handlingSendEvent_;
 }
@@ -429,14 +420,6 @@ void SwizzleInit() {
   handlingSendEvent_ = handlingSendEvent;
 }
 
-- (void)sendEvent:(NSEvent*)event {
-  base::mac::ScopedSendingEvent sendingEventScoper;
-  for (id<CrApplicationEventHookProtocol> handler in eventHooks_.get()) {
-    [handler hookForEvent:event];
-  }
-  [super sendEvent:event];
-}
-
 // NSExceptions which are caught by the event loop are logged here.
 // NSException uses setjmp/longjmp, which can be very bad for C++, so
 // we attempt to track and report them.