Revert of PaintChunk::id

Revert of PaintChunk::id (patchset #10 id:180001 of https://codereview.chromium.org/2116693002/ )

Reason for revert:
Test failures on WebKit Win x64 Builder (dbg) since https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win%20x64%20Builder%20%28dbg%29/builds/89039.

failures:
PaintChunkerTest.BuildChunksFromNestedTransforms
PaintChunkerTest.ChangingPropertiesWithoutItems
PaintChunkerTest.SingleNonEmptyRange
PaintChunkerTest.CreatesSeparateChunksWhenRequested
PaintChunkerTest.ChunkIds
PaintChunkerTest.SamePropertiesTwiceCombineIntoOneChunk
PaintChunkerTest.ChunkIdsSkippingCache
PaintChunkerTest.BuildMultipleChunksWithSinglePropertyChanging
PaintChunkerTest.CanRewindDisplayItemIndex
PaintChunkerTest.BuildMultipleChunksWithDifferentPropertyChanges

Original issue's description:
> PaintChunk::id
>
> The id will be used in rasterization paint invalidation to match old
> and new paint chunks. It can be also used in incremental layerization.
>
> BUG=510908
>
> Committed: https://crrev.com/5426e435a6a1c6761b7d9565f769fcde10e7b99c
> Cr-Commit-Position: refs/heads/master@{#406461}

TBR=chrishtr@chromium.org,pdr@chromium.org,wangxianzhu@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=510908
Committed: https://crrev.com/3a9f8efd422ed8a943280774b3afc31fbb1f05af
Cr-Commit-Position: refs/heads/master@{#406479}

[hayato, 2016-07-20 04:18:11]

The CQ bit was checked by hayato@chromium.org

[hayato, 2016-07-20 04:18:11]

Created Revert of PaintChunk::id

[commit-bot: I haz the power, 2016-07-20 04:18:43]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-20 04:21:27]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-20 04:24:21]

Description was changed from

==========
Revert of PaintChunk::id (patchset #10 id:180001 of
https://codereview.chromium.org/2116693002/ )

Reason for revert:
Test failures on WebKit Win x64 Builder (dbg) since
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win%20x64%20Bu....


failures:
PaintChunkerTest.BuildChunksFromNestedTransforms
PaintChunkerTest.ChangingPropertiesWithoutItems
PaintChunkerTest.SingleNonEmptyRange
PaintChunkerTest.CreatesSeparateChunksWhenRequested
PaintChunkerTest.ChunkIds
PaintChunkerTest.SamePropertiesTwiceCombineIntoOneChunk
PaintChunkerTest.ChunkIdsSkippingCache
PaintChunkerTest.BuildMultipleChunksWithSinglePropertyChanging
PaintChunkerTest.CanRewindDisplayItemIndex
PaintChunkerTest.BuildMultipleChunksWithDifferentPropertyChanges


Original issue's description:
> PaintChunk::id
> 
> The id will be used in rasterization paint invalidation to match old
> and new paint chunks. It can be also used in incremental layerization.
> 
> BUG=510908
> 
> Committed: https://crrev.com/5426e435a6a1c6761b7d9565f769fcde10e7b99c
> Cr-Commit-Position: refs/heads/master@{#406461}

TBR=chrishtr@chromium.org,pdr@chromium.org,wangxianzhu@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=510908
==========

to

==========
Revert of PaintChunk::id (patchset #10 id:180001 of
https://codereview.chromium.org/2116693002/ )

Reason for revert:
Test failures on WebKit Win x64 Builder (dbg) since
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win%20x64%20Bu....

failures:
PaintChunkerTest.BuildChunksFromNestedTransforms
PaintChunkerTest.ChangingPropertiesWithoutItems
PaintChunkerTest.SingleNonEmptyRange
PaintChunkerTest.CreatesSeparateChunksWhenRequested
PaintChunkerTest.ChunkIds
PaintChunkerTest.SamePropertiesTwiceCombineIntoOneChunk
PaintChunkerTest.ChunkIdsSkippingCache
PaintChunkerTest.BuildMultipleChunksWithSinglePropertyChanging
PaintChunkerTest.CanRewindDisplayItemIndex
PaintChunkerTest.BuildMultipleChunksWithDifferentPropertyChanges

Original issue's description:
> PaintChunk::id
>
> The id will be used in rasterization paint invalidation to match old
> and new paint chunks. It can be also used in incremental layerization.
>
> BUG=510908
>
> Committed: https://crrev.com/5426e435a6a1c6761b7d9565f769fcde10e7b99c
> Cr-Commit-Position: refs/heads/master@{#406461}

TBR=chrishtr@chromium.org,pdr@chromium.org,wangxianzhu@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=510908

Committed: https://crrev.com/3a9f8efd422ed8a943280774b3afc31fbb1f05af
Cr-Commit-Position: refs/heads/master@{#406479}
==========

[commit-bot: I haz the power, 2016-07-20 04:24:22]

Patchset 1 (id:??) landed as
https://crrev.com/3a9f8efd422ed8a943280774b3afc31fbb1f05af
Cr-Commit-Position: refs/heads/master@{#406479}