Update PanelManager's display settings when they change (OSX).

BUG=101407


Review URL: http://codereview.chromium.org/8437026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@108227 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/app_controller_mac.mm

@@ -51,6 +51,7 @@
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_controller.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_window_controller.h"
 #include "chrome/browser/ui/cocoa/task_manager_mac.h"
+#include "chrome/browser/ui/panels/panel_manager.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_paths_internal.h"
 #include "chrome/common/chrome_switches.h"
@@ -1250,6 +1251,17 @@ const AEEventClass kAECloudPrintUninstallClass = 'GCPu';
   return bookmarkMenuBridge_.get();
 }
 
+- (void)applicationDidChangeScreenParameters:(NSNotification *)notification {
+  // During this callback the working area is not always already updated. Defer.
+  [self performSelector:@selector(delayedPanelManagerScreenParametersUpdate)
+             withObject:nil
+             afterDelay:0];
+}
+
+- (void)delayedPanelManagerScreenParametersUpdate {
+  PanelManager::GetInstance()->OnDisplayChanged();
+}
+
 @end  // @implementation AppController
 
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