Add initial support for runtime permissions in android M.

components/infobars/core/infobar_delegate.h

Index: components/infobars/core/infobar_delegate.h
diff --git a/components/infobars/core/infobar_delegate.h b/components/infobars/core/infobar_delegate.h
index bd7455f02198511f521ebff61d928b1ad4a6a0f7..d8b690783de8d40cf9beb851c77b37f4b3e30b37 100644
--- a/components/infobars/core/infobar_delegate.h
+++ b/components/infobars/core/infobar_delegate.h
@@ -14,6 +14,7 @@ class ConfirmInfoBarDelegate;
 class InsecureContentInfoBarDelegate;
 class MediaStreamInfoBarDelegate;
 class NativeAppInfoBarDelegate;
+class PermissionInfobarDelegate;
 class PopupBlockedInfoBarDelegate;
 class RegisterProtocolHandlerInfoBarDelegate;
 class ScreenCaptureInfoBarDelegate;
@@ -117,6 +118,7 @@ class InfoBarDelegate {
   virtual InsecureContentInfoBarDelegate* AsInsecureContentInfoBarDelegate();
   virtual MediaStreamInfoBarDelegate* AsMediaStreamInfoBarDelegate();
   virtual NativeAppInfoBarDelegate* AsNativeAppInfoBarDelegate();
+  virtual PermissionInfobarDelegate* AsPermissionInfobarDelegate();
   virtual PopupBlockedInfoBarDelegate* AsPopupBlockedInfoBarDelegate();
   virtual RegisterProtocolHandlerInfoBarDelegate*
       AsRegisterProtocolHandlerInfoBarDelegate();