Mac: Fix SDK 10.11 Compile errors after clang roll in r387792

chrome/browser/ui/cocoa/panels/panel_window_controller_cocoa.mm

Index: chrome/browser/ui/cocoa/panels/panel_window_controller_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/panels/panel_window_controller_cocoa.mm b/chrome/browser/ui/cocoa/panels/panel_window_controller_cocoa.mm
index dc51ed7292969ea3ace18eb725650e6e0637ac5c..4c066a47de96ee7a03d1bc7b4675369a1849efce 100644
--- a/chrome/browser/ui/cocoa/panels/panel_window_controller_cocoa.mm
+++ b/chrome/browser/ui/cocoa/panels/panel_window_controller_cocoa.mm
@@ -14,6 +14,7 @@
 #include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"  // IDC_*
+#import "chrome/browser/app_controller_mac.h"
 #include "chrome/browser/chrome_browser_application_mac.h"
 #include "chrome/browser/profiles/profile.h"
 #import "chrome/browser/ui/cocoa/browser_window_utils.h"
@@ -338,8 +339,10 @@ const double kWidthOfMouseResizeArea = 15.0;
     CommandUpdater* command_updater = windowShim_->panel()->command_updater();
     if (command_updater->SupportsCommand(tag))
       return command_updater->IsCommandEnabled(tag);
-    else
-      return [[NSApp delegate] validateUserInterfaceItem:item];
+
+    AppController* appController =
+        base::mac::ObjCCastStrict<AppController>([NSApp delegate]);
+    return [appController validateUserInterfaceItem:item];
   }
   return NO;
 }
@@ -350,10 +353,13 @@ const double kWidthOfMouseResizeArea = 15.0;
   DCHECK(sender);
   NSInteger tag = [sender tag];
   CommandUpdater* command_updater = windowShim_->panel()->command_updater();
-  if (command_updater->SupportsCommand(tag))
+  if (command_updater->SupportsCommand(tag)) {
     windowShim_->panel()->ExecuteCommandIfEnabled(tag);
-  else
-    [[NSApp delegate] commandDispatch:sender];
+  } else {
+    AppController* appController =
+        base::mac::ObjCCastStrict<AppController>([NSApp delegate]);
+    [appController commandDispatch:sender];
+  }
 }
 
 // Handler for the custom Close button.