Reland of cc: Add mailbox support to ResourceProvider write locks.

Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1 id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset #5 id:70001 of https://codereview.chromium.org/2081883002/ )
>
> Reason for revert:
> Causing canvas crashes - bug 623101
>
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
>
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
>
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

TBR=piman@chromium.org
BUG=525259, 621422, 621130
Committed: https://crrev.com/5d6ff0d0e4c450cfb12aef3b455f63d380731935
Cr-Commit-Position: refs/heads/master@{#402345}

[sunnyps, 2016-06-27 21:38:56]

Created Reland of cc: Add mailbox support to ResourceProvider write locks.

[sunnyps, 2016-06-27 21:39:35]

Description was changed from

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Reason for revert:
Reland

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
> 
> Reason for revert:
> Causing canvas crashes - bug 623101
> 
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
> 
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
> 
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

TBR=piman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=525259, 621422, 621130
==========

to

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
> 
> Reason for revert:
> Causing canvas crashes - bug 623101
> 
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
> 
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
> 
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

TBR=piman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=525259, 621422, 621130
==========

[sunnyps, 2016-06-27 21:39:45]

Description was changed from

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
> 
> Reason for revert:
> Causing canvas crashes - bug 623101
> 
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
> 
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
> 
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

TBR=piman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=525259, 621422, 621130
==========

to

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
> 
> Reason for revert:
> Causing canvas crashes - bug 623101
> 
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
> 
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
> 
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

R=piman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=525259, 621422, 621130
==========

[sunnyps, 2016-06-27 21:43:39]

Description was changed from

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
> 
> Reason for revert:
> Causing canvas crashes - bug 623101
> 
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
> 
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
> 
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

R=piman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=525259, 621422, 621130
==========

to

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
> 
> Reason for revert:
> Causing canvas crashes - bug 623101
> 
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
> 
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
> 
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

R=piman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=525259, 623101
==========

[sunnyps, 2016-06-27 21:46:42]

Description was changed from

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
> 
> Reason for revert:
> Causing canvas crashes - bug 623101
> 
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
> 
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
> 
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

R=piman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=525259, 623101
==========

to

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
> 
> Reason for revert:
> Causing canvas crashes - bug 623101
> 
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
> 
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
> 
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

R=piman@chromium.org
BUG=525259, 623101
==========

[sunnyps, 2016-06-27 22:53:09]

Description was changed from

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
> 
> Reason for revert:
> Causing canvas crashes - bug 623101
> 
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
> 
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
> 
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

R=piman@chromium.org
BUG=525259, 623101
==========

to

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
> 
> Reason for revert:
> Causing canvas crashes - bug 623101
> 
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
> 
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
> 
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

TBR=piman@chromium.org
BUG=525259, 621422, 621130
==========

[sunnyps, 2016-06-27 22:53:49]

So it turns out that this CL was not responsible for the
WebExternalTextureLayerImpl crash so I'm relanding it.

[sunnyps, 2016-06-27 22:54:01]

The CQ bit was checked by sunnyps@chromium.org

[commit-bot: I haz the power, 2016-06-27 22:55:12]

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, 2016-06-28 00:40:24]

Description was changed from

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
> 
> Reason for revert:
> Causing canvas crashes - bug 623101
> 
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
> 
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
> 
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

TBR=piman@chromium.org
BUG=525259, 621422, 621130
==========

to

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
> 
> Reason for revert:
> Causing canvas crashes - bug 623101
> 
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
> 
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
> 
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

TBR=piman@chromium.org
BUG=525259, 621422, 621130
==========

[commit-bot: I haz the power, 2016-06-28 00:40:25]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-28 00:42:16]

Description was changed from

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
> 
> Reason for revert:
> Causing canvas crashes - bug 623101
> 
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
> 
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
> 
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

TBR=piman@chromium.org
BUG=525259, 621422, 621130
==========

to

==========
Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset #1
id:1 of https://codereview.chromium.org/2106503002/ )

Original issue's description:
> Revert of cc: Add mailbox support to ResourceProvider write locks. (patchset
#5 id:70001 of https://codereview.chromium.org/2081883002/ )
>
> Reason for revert:
> Causing canvas crashes - bug 623101
>
> Original issue's description:
> > Reland of cc: Add mailbox support to ResourceProvider write locks. (patchset
#24 id:460001 of https://codereview.chromium.org/1951193002/ )
> >
> > Original issue's description:
> > > cc: Add mailbox support to ResourceProvider write locks.
> > >
> > > This adds support for mailboxes to ScopedWriteLockGL. Using the mailbox
> > > requires using ScopedTextureProvider/ScopedSkSurfaceProvider which
> > > ensures that the texture id for the mailbox is destroyed after use on
> > > the worker context.
> > >
> > > This CL also includes the following cleanup:
> > > 1. ResourceProvider locks don't keep resource pointers around.
> > > 2. ScopedSamplerGL does not inherit from ScopedReadLockGL.
> > > 3. GpuRasterizer is folded back into GpuRasterBufferProvider.
> > > 4. TileTaskManager does not own RasterBufferProvider.
> > >
> > > BUG=525259
> > > R=piman@chromium.org
> > > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> > >
> > > Committed: https://crrev.com/5fa5dbdf25bbec21b84f752d3f0642cd184467e2
> > > Committed: https://crrev.com/3b0f0b8d3db0a9f66864d5b7da87c82f49e74a29
> > > Cr-Original-Commit-Position: refs/heads/master@{#398204}
> > > Cr-Commit-Position: refs/heads/master@{#399983}
> >
> > R=piman@chromium.org
> > BUG=525259, 621422, 621130
> > CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
> >
> > Committed: https://crrev.com/b3071e4aabd0cb1f29cd624e77eb5f40722be965
> > Cr-Commit-Position: refs/heads/master@{#401717}
>
> TBR=piman@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=525259, 621422, 621130
>
> Committed: https://crrev.com/4d27a5a3c38c34bfa34e9937ef8e3ea3831d2194
> Cr-Commit-Position: refs/heads/master@{#402290}

TBR=piman@chromium.org
BUG=525259, 621422, 621130

Committed: https://crrev.com/5d6ff0d0e4c450cfb12aef3b455f63d380731935
Cr-Commit-Position: refs/heads/master@{#402345}
==========

[commit-bot: I haz the power, 2016-06-28 00:42:17]

Patchset 1 (id:??) landed as
https://crrev.com/5d6ff0d0e4c450cfb12aef3b455f63d380731935
Cr-Commit-Position: refs/heads/master@{#402345}