Move RequestPpapiBrokerPermission from WebContentsObserver to WebContentsDelegate.

content/public/browser/web_contents_delegate.h

Index: content/public/browser/web_contents_delegate.h
diff --git a/content/public/browser/web_contents_delegate.h b/content/public/browser/web_contents_delegate.h
index db2fc9cc930eb60f4e7939dcd62d3df2b810eded..9bf5d40f0b0e21108cef841f171b640198fb69f6 100644
--- a/content/public/browser/web_contents_delegate.h
+++ b/content/public/browser/web_contents_delegate.h
@@ -418,6 +418,15 @@ class CONTENT_EXPORT WebContentsDelegate {
       const MediaStreamRequest* request,
       const MediaResponseCallback& callback) {}
 
+  // Requests permission to access the PPAPI broker. The delegate should return
+  // true and call the passed in |callback| with the result, or return false
+  // to indicate that it does not support asking for permission.
+  virtual bool RequestPpapiBrokerPermission(
+      WebContents* web_contents,
+      const GURL& url,
+      const FilePath& plugin_path,
+      const base::Callback<void(bool)>& callback);
+
  protected:
   virtual ~WebContentsDelegate();