Optimize webgl texImage2D from YUV video textures.

Optimize webgl texImage2D from YUV video textures.

The current path does a conversion from YUV to an RGBA SkImage, then
paints that to another Skia canvas and does a CopyTexImageCHROMIUM to
the WebGL texture.

We can optimize this by removing the paint to the canvas and doing a
copy directly from the SkImage to the WebGL texture.

BUG=625900
Review-Url: https://codereview.chromium.org/2127053004
Cr-Commit-Position: refs/heads/master@{#406735}
(cherry picked from commit 581d041c9971bb533e2cbd5c57014ee026fb50e6)

Committed: https://chromium.googlesource.com/chromium/src/+/9453c3f083a2f9d777412cf67cbd5feacfc3b87d

[jbauman, 2016-08-01 22:21:41]

Description was changed from

==========
Optimize webgl texImage2D from YUV video textures.

The current path does a conversion from YUV to an RGBA SkImage, then
paints that to another Skia canvas and does a CopyTexImageCHROMIUM to
the WebGL texture.

We can optimize this by removing the paint to the canvas and doing a
copy directly from the SkImage to the WebGL texture.

BUG=625900

Review-Url: https://codereview.chromium.org/2127053004
Cr-Commit-Position: refs/heads/master@{#406735}
(cherry picked from commit 581d041c9971bb533e2cbd5c57014ee026fb50e6)
==========

to

==========
Optimize webgl texImage2D from YUV video textures.

The current path does a conversion from YUV to an RGBA SkImage, then
paints that to another Skia canvas and does a CopyTexImageCHROMIUM to
the WebGL texture.

We can optimize this by removing the paint to the canvas and doing a
copy directly from the SkImage to the WebGL texture.

BUG=625900

Review-Url: https://codereview.chromium.org/2127053004
Cr-Commit-Position: refs/heads/master@{#406735}
(cherry picked from commit 581d041c9971bb533e2cbd5c57014ee026fb50e6)

Committed:
https://chromium.googlesource.com/chromium/src/+/9453c3f083a2f9d777412cf67cbd...
==========

[jbauman, 2016-08-01 22:21:42]

Committed patchset #1 (id:1) manually as
9453c3f083a2f9d777412cf67cbd5feacfc3b87d.