Implement permission bubble view for Cocoa.

chrome/browser/ui/cocoa/browser_window_controller.h

Index: chrome/browser/ui/cocoa/browser_window_controller.h
diff --git a/chrome/browser/ui/cocoa/browser_window_controller.h b/chrome/browser/ui/cocoa/browser_window_controller.h
index c1b15df8e51967a687cb9a9e97782cab50fdfd7b..b108c6e0434b6ab3e3a4b29d7bbc05b6447a5431 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.h
+++ b/chrome/browser/ui/cocoa/browser_window_controller.h
@@ -38,6 +38,7 @@ class ExtensionKeybindingRegistryCocoa;
 @class InfoBarContainerController;
 class LocationBarViewMac;
 @class OverlayableContentsController;
+class PermissionBubbleCocoa;
 @class PresentationModeController;
 class StatusBubbleMac;
 @class TabStripController;
@@ -121,6 +122,9 @@ class WebContents;
   // window in fullscreen mode, so this is always nil on Lion.
   base::scoped_nsobject<NSWindow> fullscreenWindow_;
 
+  // The Cocoa implementation of the PermissionBubbleView.
+  scoped_ptr<PermissionBubbleCocoa> permissionBubbleCocoa_;
+
   // Tracks whether presentation mode was entered from fullscreen mode or
   // directly from normal windowed mode.  Used to determine what to do when
   // exiting presentation mode.