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

This matches the behavior of NSPopover.

This is done by overriding the SPI _sharesParentKeyState, which works on 10.7 but
not on 10.6. If we want to get this right on 10.6, we could use the SPI described
in http://code.google.com/p/chromium/issues/detail?id=44087#c42 , but since we
didn't feel we need this until now, we can probably live with this being 10.7-only.

I do need this functionality for the history-swipe-overlay.

BUG=none
TEST=Click e.g. bookmark star. Bookmark bubble should appear, browser window close
button should still look active.


Review URL: http://codereview.chromium.org/7585013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@95708 0039d316-1c4b-4281-b951-d872f2087c98

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;

chrome/browser/ui/cocoa/tabpose_window.mm

@@ -1196,6 +1196,12 @@ void AnimateCALayerOpacityFromTo(
  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;
+}
+
 // Handle key events that should be executed repeatedly while the key is down.
 - (void)keyDown:(NSEvent*)event {
   if (state_ == tabpose::kFadingOut)