Clear the clipboard closing Incognito window

content/public/browser/browser_context.h

Index: content/public/browser/browser_context.h
diff --git a/content/public/browser/browser_context.h b/content/public/browser/browser_context.h
index d82326af349346c468ef9a17908198c4f1b9794b..2ad358f48b9a02e89d4d366bebe64c77bab069cc 100644
--- a/content/public/browser/browser_context.h
+++ b/content/public/browser/browser_context.h
@@ -94,6 +94,11 @@ class CONTENT_EXPORT BrowserContext : public base::SupportsUserData {
   // Tells the HTML5 objects on this context to purge any uneeded memory.
   static void PurgeMemory(BrowserContext* browser_context);
 
+  // Returns a Clipboard::SourceTag (pointer) if |context| is OffTheRecord
+  // context. Otherwise, NULL. If the clipboard contains that SourceTag at the
+  // time of |context| destruction it will be flushed.
+  static void* GetMarkerForOffTheRecordContext(BrowserContext* context);
+
   virtual ~BrowserContext();
 
   // Returns the path of the directory where this context's data is stored.