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From Skia's repo:

http://code.google.com/p/skia/source/detail?r=11751
Add SkPDFDeviceFlatenner which extends SkPDFDevice to add support
to flatten the path and the text when we have perspective. prepare
to deprecate SkPDFDevice constructor, and route gm and render_pdfs
to use SkDocument::Create pdf interface instead. - controlled by a
flag add comments where we are supposed to flatten other features
(paint, shaders, ... )

https://code.google.com/p/skia/source/detail?r=11822
Implement perspective for bitmaps in pdf.

https://code.google.com/p/skia/source/detail?r=11937
PDF: support perspective in simple shaders. (this version does not
work well with tilling)

BUG:11384071

Change-Id: I48ea88d231231215349f155d972c6b9e1e127c71

This captures revisions r11503 to r11657 (inclusive). This range appears
large, but covers a span of just 3 commits one of which has already been
cherry-picked into this repository.

bug: 10285384

Change-Id: I614888fe1b65f31a713a689ccb3a9db6265b60e8

cherry-pick of http://code.google.com/p/skia/source/detail?r=11472

bug: 11115961
Change-Id: I0ed8af0bdec006178e5e6bd1c0a0c4f1cb517961

cherry-pick of http://code.google.com/p/skia/source/detail?r=11641

bug: 11093744
Change-Id: I2efa84c612e5a790a61707eae7e078a3b8215e2e

Do not attempt to convert non gray PNG to A8.
For an A8 image, do not consider it opaque.

cherry-picked from https://codereview.chromium.org/24882002 in Skia:

Do not convert non gray PNG to A8.

If the user requested A8, but the source is not gray, switch to
ARGB8888.

cherry-picked from https://codereview.chromium.org/25726004 in Skia:

Fixes for decoding to A8.

src/images/SkImageDecoder_libpng.cpp:
A8 images are not opaque, so do not set the opaque flag.
This fixes a bug where copyTo does not work as expected (when
copying an A8 decoded image to ARGB_8888), leading to
a bitmap hash that does not represent the image correctly
(in skimage).

tools/skimage_main.cpp:
In write_bitmap, which is creating the image for visual comparison,
copy A8 to 8888, since A8 cannot be encoded.

In the section that tests reencoding, do not test reencoding A8,
which is known to not work.

BUG:9189955

Cherry-pick of https://code.google.com/p/skia/source/detail?r=11586

bug: 11001915
Change-Id: Id7e09ac0f9169601a0706266f0b4e39ad45b5e8b

Cherry-pick of https://code.google.com/p/skia/source/detail?r=11394

bug: 10653841
Change-Id: If50522fae5a8b749dbf97db8eca8c518cd710ebf

cherry-pick of http://code.google.com/p/skia/source/detail?r=11420

bug:10845219
Change-Id: I94b765a462521a17b4e432a639e3f1484cc180c3

Do not build bench which depends on more recent changes to
bench not included by android yet.

Change-Id: Icddcd60be3cb5f577378b0a82c8d0084fdebc498

Only implemented for PNG.

Add a getter and setter, and sets the default to false in the
constructor. Also copies the setting in copyFieldsToOther.

Fix an indpendent bug where fDitherImage was not being copied in
copyFieldsToOther.

In SkScaledBitmapSampler::begin, consolidate the settings passed in
by passing a const reference to the decoder. The decoder can be
referenced for its settings of dither, unpremultiplied, and now
skipping writing zeroes. Update callers to use the new API. In png
decoder, rather than passing around a pointer to an initial
read of getDitherImage, and potentially changing it, look at the
field on the decoder itself, and modify it directly. This is a
change in behavior - now if that same decoder is used to decode
a different image, the dither setting has changed. I think this is
okay because A) the typical use case is to use a new decoder for
each decode, B) we do not make any promises that a decode does not
change the decoder and C) it makes the code in SkScaledBitmapSampler
much cleaner.

In SkScaledBitmapScampler, add new row procs for skipping zeroes. Now
that choosing the row proc has five dimensions (src config, dst config,
dither, skip writing zeroes, unpremultiplied), use a new method: each
src/dst combination has a function for choosing the right proc depending
on the decoder.

SkScaledBitmapScampler::RowProc is now public for convenience.

Remove Sample_Gray_D8888_Unpremul, which is effectively no different
from Sample_Gray_D8888.

In cases where unpremultiplied was trivial, such as 565 and when
sampling from gray, decoding may now succeed.

Add a benchmark (currently disabled) for comparing the speed of skipping
writing zeroes versus not skipping. For this particular image, which is
mostly transparent pixels, normal decoding took about 3.6 milliseconds,
while skipping zeroes in the decode took only about 2.5 milliseconds
(this is on a Nexus 4). Presumably it would be slower on an image
with a small amount of transparency, but there will be no slowdown
for an image which reports that it has no transparency.

In SkImageRef_ashmem, always skip writing zeroes, since ashmem
memory is guaranteed to be initialized to 0.

Add a flag to skip writing zeroes in skimage.

Add a regression test for choosing the rowproc to ensure I did not
change any behavior accidentally.

BUG:10016979
Change-Id: I5986ae750b85a9c9d8e3cafeebe904910247de3b

bug:10221459
Change-Id: I89a5e7ee3966a3f548471d5b64e3b969b3a3e2d8

This captures revisions r11183 to r11196 (inclusive). However, some
Canvas changes have already been cherry-picked so they will not show
up in this CL.

bug: 10285384

Change-Id: I2b22937d68f18b40bb3914bd94142ed21f8ae4c0

bug: 10314402
Change-Id: I31ed88fd072f0dbb23f20f383d410d55f7bcd202

This will require changes to the framework and WebView.

bug: 10730965
Change-Id: Ie8585184bf6afe59ae1513f90329ba0fd4bb4f6c

Bug: 10791813
Change-Id: Ia2e06dc14793f97914c3fd3d437231def8e3ebd1

Two Skia changes required for
https://googleplex-android-review.git.corp.google.com/#/c/357301/:

https://codereview.chromium.org/23464068/:
Use the default resync_to_restart in jpeg.

Our version requires rewinding the stream, which is not always
supported. Instead, depend on jpeg's default version.

This is required because the new framework code assumes that an
image stream will never be rewound unless it's at the beginning.

https://codereview.chromium.org/23717055/:
Add a buffered SkStream class.

This is used by Android to buffer an input stream which may not
otherwise be able to rewind.

Add a test for the new class.

This change allows us to buffer natively, and to only buffer the
beginning of the stream, which is all that is needed by the image
decoders.

BUG:8432093
BUG:6493544
BUG:10725383

Change-Id: I39fb1346866066693e14b6bcab1c398b9befa296

Bug: 10310267
Change-Id: If4ba6e07fcd3b8819d03f230adc705f15b974404

This is a fix for bug 10769257.

In the case where origFontID is also the first font in the fallback
list, the nextLogicalTypeface function was picking the first font in the
fallback list, which was causing looping. Simply allowing it to advance
to the next typeface fixes the ANR.

Change-Id: Icc1389af46aff7f6b9c96cc0e8c8e9ae74039554

Bug: 10310267
Change-Id: If4ba6e07fcd3b8819d03f230adc705f15b974404