Fix a bug that caused a crash by NULL pointer dereference.

BUG=40624
TEST=manually

Review URL: http://codereview.chromium.org/1540018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@43808 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 7 insertions, 3 deletions

diff --git a/views/controls/button/native_button_gtk.cc b/views/controls/button/native_button_gtk.cc
index 1fc7fac..4a54fc5 100644
--- a/views/controls/button/native_button_gtk.cc
+++ b/views/controls/button/native_button_gtk.cc
@@ -245,11 +245,15 @@ void NativeRadioButtonGtk::ViewHierarchyChanged(bool is_add,
                 "radio-button views.";
             continue;
           }
-          // Join the group
+          // Join the group, if the peer's native wrapper is present.
+          // A button without wrapper will be added to the group in
+          // its own ViewHierachyChanged.
           NativeButtonWrapper* wrapper =
               static_cast<RadioButton*>(*i)->native_wrapper();
-          SetGroupFrom(wrapper);
-          break;
+          if (wrapper) {
+            SetGroupFrom(wrapper);
+            break;
+          }
         }
       }
     }