SkImage-ify DragImage

SkImage-ify DragImage

Rework DragImage using the SkImage API. Significant bits:

* get rid of Image::deprecatedBitmapCurrentFrame callers, convert to Image::imageForCurrentFrame

* consolidate the currently distinct DragImage passes (create, fitToMaxSize, dissolveToFraction)
  into a single pass (this can avoid several unneeded copies)

* implement the above using Skia SkSurface/SkCanvas primitives (instead of ImageOperations::Resize
  and direct pixel RAM poking)

* avoid unneeded rasterization in LocalFrame::paintIntoDragImage() - return an
  SkPictureImageGenerator-backed Image instead

* also remove an unneeded clip and related plumbing in LocalFrame::paintIntoDragImage()

BUG=449197
R=reed@google.com,junov@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=200605

[f(malita), 2015-08-14 13:31:54]

fmalita@chromium.org changed reviewers:
+ junov@chromium.org, reed@google.com

[f(malita), 2015-08-14 14:34:45]

A couple of trivial rebaselines due to minor differences in Chromium vs. Skia
image filtering:
https://storage.googleapis.com/chromium-layout-test-archives/linux_blink_rel/...

[Justin Novosad, 2015-08-14 18:08:59]

lgtm

I like this SkImage::NewFromPicture business. You are giving me ideas for 2D
canvas...

[f(malita), 2015-08-14 19:09:57]

On 2015/08/14 18:08:59, Justin Novosad wrote:
> I like this SkImage::NewFromPicture business. You are giving me ideas for 2D
> canvas...

Hot off the press :)

At the moment they are always sw-rasterized, but Mike is working on adding a GPU
path as we speak.

[f(malita), 2015-08-14 19:10:01]

The CQ bit was checked by fmalita@chromium.org

[commit-bot: I haz the power, 2015-08-14 19:10:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1290133002/100001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1290133002/100001

[commit-bot: I haz the power, 2015-08-14 20:05:55]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-08-14 20:05:56]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[f(malita), 2015-08-14 20:22:04]

The CQ bit was checked by fmalita@chromium.org

[commit-bot: I haz the power, 2015-08-14 20:22:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1290133002/100001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1290133002/100001

[commit-bot: I haz the power, 2015-08-14 22:53:43]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-08-14 22:53:44]

Try jobs failed on following builders:
  win_chromium_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[f(malita), 2015-08-15 10:20:43]

The CQ bit was checked by fmalita@chromium.org

[commit-bot: I haz the power, 2015-08-15 10:20:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1290133002/100001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1290133002/100001

[commit-bot: I haz the power, 2015-08-15 11:26:11]

Committed patchset #6 (id:100001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=200605