Clear LifecycleObserver::m_context when LifecycleObserver::contextDestroyed gets called

third_party/WebKit/Source/platform/LifecycleObserver.h

Index: third_party/WebKit/Source/platform/LifecycleObserver.h
diff --git a/third_party/WebKit/Source/platform/LifecycleObserver.h b/third_party/WebKit/Source/platform/LifecycleObserver.h
index 34a491f3ce15d5cc8f1fe7003c1db255639bb81d..ed8dee5a5e9cdfb7e3d267042afe236a89802208 100644
--- a/third_party/WebKit/Source/platform/LifecycleObserver.h
+++ b/third_party/WebKit/Source/platform/LifecycleObserver.h
@@ -43,6 +43,11 @@ public:
 
     Context* lifecycleContext() const { return m_lifecycleContext; }
 
+    void clearContext()
+    {
+        setContext(nullptr);
+    }
+
 protected:
     explicit LifecycleObserver(Context* context)
         : m_lifecycleContext(nullptr)
@@ -52,11 +57,6 @@ protected:
 
     void setContext(Context*);
 
-    void clearContext()
-    {
-        setContext(nullptr);
-    }
-
 private:
     WeakMember<Context> m_lifecycleContext;
 };