Update from https://crrev.com/312398

base/cancelable_callback.h

Index: base/cancelable_callback.h
diff --git a/base/cancelable_callback.h b/base/cancelable_callback.h
index 91eb046153c9cc5412e9339dd19a1c181d7337bf..2b9d26094641b2133bc2ba55fe744aa88086bc8a 100644
--- a/base/cancelable_callback.h
+++ b/base/cancelable_callback.h
@@ -62,8 +62,7 @@ class CancelableCallback<void(A...)> {
 
   // |callback| must not be null.
   explicit CancelableCallback(const base::Callback<void(A...)>& callback)
-      : weak_factory_(this),
-        callback_(callback) {
+      : callback_(callback), weak_factory_(this) {
     DCHECK(!callback.is_null());
     InitializeForwarder();
   }
@@ -113,17 +112,15 @@ class CancelableCallback<void(A...)> {
                             weak_factory_.GetWeakPtr());
   }
 
-  // Used to ensure Forward() is not run when this object is destroyed.
-  // TODO(ckehoe): This should be the last class member.
-  // Move it there when crbug.com/433583 is fixed.
-  base::WeakPtrFactory<CancelableCallback<void(A...)> > weak_factory_;
-
   // The wrapper closure.
   base::Callback<void(A...)> forwarder_;
 
   // The stored closure that may be cancelled.
   base::Callback<void(A...)> callback_;
 
+  // Used to ensure Forward() is not run when this object is destroyed.
+  base::WeakPtrFactory<CancelableCallback<void(A...)>> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(CancelableCallback);
 };