Add missing .Pass() on return of SampleVector

On VS2015 without this causes:

d:\src\cr3\src\base\metrics\histogram.cc(372): error C2248: 'scoped_ptr<base::SampleVector,base::DefaultDeleter<T>>::scoped_ptr': cannot access private member declared in class 'scoped_ptr<base::SampleVector,base::DefaultDeleter<T>>'
        with
        [
            T=base::SampleVector
        ]
d:\src\cr3\src\base\memory\scoped_ptr.h(312): note: see declaration of 'scoped_ptr<base::SampleVector,base::DefaultDeleter<T>>::scoped_ptr'
        with
        [
            T=base::SampleVector
        ]

I'm not entirely sure why this doesn't happen on earlier compilers,
I guess something's move-ability changed.

R=isherman@chromium.org
BUG=440500

Review URL: https://codereview.chromium.org/882783002

Cr-Commit-Position: refs/heads/master@{#313378}


CrOS-Libchrome-Original-Commit: 3bec0ffd9cfd92611182bc0f28e5dbc57f4cbaf1
1 file changed
tree: 16e96a8c4fccbeedd2ba0b29236c5194b9b36742
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/