Initial work on making extensions work in incognito mode.

chrome/browser/cocoa/extensions/browser_actions_controller.mm

Index: chrome/browser/cocoa/extensions/browser_actions_controller.mm
diff --git a/chrome/browser/cocoa/extensions/browser_actions_controller.mm b/chrome/browser/cocoa/extensions/browser_actions_controller.mm
index cc73d61923869502655760af0efb23598f2a3804..c3cd111f817fb70eb2ff4c0dc39b63330bb9ce7a 100644
--- a/chrome/browser/cocoa/extensions/browser_actions_controller.mm
+++ b/chrome/browser/cocoa/extensions/browser_actions_controller.mm
@@ -30,6 +30,7 @@ NSString* const kBrowserActionsChangedNotification = @"BrowserActionsChanged";
 - (void)removeActionButtonForExtension:(Extension*)extension;
 - (void)repositionActionButtons;
 - (int)currentTabId;
+- (bool)shouldDisplayBrowserAction:(Extension*)extension;
 @end
 
 // A helper class to proxy extension notifications to the view controller's
@@ -139,6 +140,9 @@ class ExtensionsServiceObserverBridge : public NotificationObserver,
   if (!extension->browser_action())
     return;
 
+  if (![self shouldDisplayBrowserAction:extension])
+    return;
+
   // Show the container if it's the first button. Otherwise it will be shown
   // already.
   if ([buttons_ count] == 0)
@@ -266,4 +270,10 @@ class ExtensionsServiceObserverBridge : public NotificationObserver,
   return [buttonOrder_ objectAtIndex:(NSUInteger)index];
 }
 
+- (bool)shouldDisplayBrowserAction:(Extension*)extension {
+  return (!profile_->IsOffTheRecord() ||
+          profile_->GetExtensionsService()->
+              IsIncognitoEnabled(extension->id()));
+}
+
 @end