mac: Window buttons should keep "active" view when bubbles / tabpose are open on 10.7

chrome/browser/ui/cocoa/info_bubble_window.mm

Index: chrome/browser/ui/cocoa/info_bubble_window.mm
diff --git a/chrome/browser/ui/cocoa/info_bubble_window.mm b/chrome/browser/ui/cocoa/info_bubble_window.mm
index 40f173cd3cc133445f0031189b0316a2b209ff03..6e0e03ae524bee6cb87c16a681a269c1d72390f0 100644
--- a/chrome/browser/ui/cocoa/info_bubble_window.mm
+++ b/chrome/browser/ui/cocoa/info_bubble_window.mm
@@ -139,6 +139,12 @@ class AppNotificationBridge : public NotificationObserver {
   return YES;
 }
 
+// Lets the traffic light buttons on the browser window keep their "active"
+// state while an info bubble is open. Only has an effect on 10.7.
+- (BOOL)_sharesParentKeyState {
+  return YES;
+}
+
 - (void)close {
   // Block the window from receiving events while it fades out.
   closing_ = YES;