Roll chromium_revision 4a456989cf..94de78b48f (407367:407377)
Roll chromium_revision 4a456989cf..94de78b48f (407367:407377)

Change log: https://chromium.googlesource.com/chromium/src/+log/4a456989cf..94de78b48f
Full diff: https://chromium.googlesource.com/chromium/src/+/4a456989cf..94de78b48f

No dependencies changed.
No update to Clang.

TBR=

Review-Url: https://codereview.webrtc.org/2177043002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#13513}

TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc