1 files changed, 9 insertions, 1 deletions
diff --git a/base/scoped_observer.h b/base/scoped_observer.h
index fdc9de3..eae63672 100644
--- a/base/scoped_observer.h
+++ b/base/scoped_observer.h
@@ -29,12 +29,20 @@ class ScopedObserver {
     source->AddObserver(observer_);
   }
 
-  // Removse the object passed to the constructor as an observer from |source|.
+  // Remove the object passed to the constructor as an observer from |source|.
   void Remove(Source* source) {
     sources_.erase(std::find(sources_.begin(), sources_.end(), source));
     source->RemoveObserver(observer_);
   }
 
+  bool IsObserving(Source* source) const {
+    for (size_t i = 0; i < sources_.size(); ++i) {
+      if (sources_[i] == source)
+        return true;
+    }
+    return false;
+  }
+
  private:
   Observer* observer_;