Synchronously drop tile textures in android webview
Synchronously drop tile textures in android webview

Merely applying zero memory is not enough to synchronously drop all tile
textures. Instead destroy and recreate TileManager instead.

BUG=496057, 499004
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1176713002

Cr-Commit-Position: refs/heads/master@{#334020}
(cherry picked from commit 3d442d362ddec4594dc12983d88bdbe24f1c361c)
TBR=boliu@chromium.org

Review URL: https://codereview.chromium.org/1178223005.

Cr-Commit-Position: d34a0005849006230ae7ffb1a9693419810a06bc@{#286}
Cr-Branched-From: 40cda19e609fd36fbf5fe489055423e611631abc@{#330231}

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