Valgrind: Update a suppression with the content namespace.

BUG=96369
TEST=none
TBR=timurrrr
Review URL: https://chromiumcodereview.appspot.com/10830083

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149096 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions.txt

@@ -3691,7 +3691,7 @@
    fun:gdk_window_ensure_native
    fun:gdk_x11_drawable_get_xid
    fun:_ZN20GtkNativeViewManager14GetIdForWidgetEP10_GtkWidget
-   fun:_ZNK23RenderWidgetHostViewGtk15GetNativeViewIdEv
+   fun:_ZNK7content23RenderWidgetHostViewGtk15GetNativeViewIdEv
 }
 {
    bug_96402