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This CL is to simplify how PaintCanvasVideoRenderer::Cache manages
video frames whose |visible_rect| is smaller than their |coded_size|.
By always using SkImage::MakeFromAdoptedTexture, texture lifetime
management is now always handled internally by skia. This will make the
transition to OOPR here much simpler.

More details about overall PaintImage effort: crbug.com/1023259
Info about the OOPR-Canvas2D project: crbug.com/1018894

Bug: 1115217
Change-Id: I2177b2deeea893fa5331afbe8796761253db2759
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2451213
Commit-Queue: Jonah Chin <jochin@microsoft.com>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Khushal <khushalsagar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#818045}