Wrap CGImageRef and CGDataRef with ScopedCFTypeRef
Wrap CGImageRef and CGDataRef with ScopedCFTypeRef

Bug: webrtc:8652
Change-Id: Ia29767bd193ae4684b7514b526b60c5ab36af5fd
Reviewed-on: https://webrtc-review.googlesource.com/64761
Commit-Queue: Zijie He <0175c16456617950f1607b27294c14b126a588d1@chromium.org>
Reviewed-by: Zijie He <0175c16456617950f1607b27294c14b126a588d1@chromium.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#22636}
ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc