Don't call the Pass methods of rtc::Buffer, rtc::scoped_ptr, and rtc::ScopedVector

We can now use std::move instead!

This CL leaves the Pass methods in place; a follow-up CL will add deprecation annotations to them.

Review URL: https://codereview.webrtc.org/1460043002

Cr-Commit-Position: refs/heads/master@{#11064}

webrtc/modules/video_coding/jitter_buffer.cc

@@ -219,7 +219,7 @@ VCMJitterBuffer::VCMJitterBuffer(Clock* clock,
     : clock_(clock),
       running_(false),
       crit_sect_(CriticalSectionWrapper::CreateCriticalSection()),
-      frame_event_(event.Pass()),
+      frame_event_(std::move(event)),
       max_number_of_frames_(kStartNumberOfFrames),
       free_frames_(),
       decodable_frames_(),