Add miniz library to third_party, use it on Windows

Add miniz library to third_party, use it on Windows

[hal.canary, 2014-08-13 17:31:11]

hold until after M38 branch.

[mtklein, 2014-08-13 17:57:09]

https://codereview.chromium.org/469813002/diff/1/gyp/skflate.gyp
File gyp/skflate.gyp (right):

https://codereview.chromium.org/469813002/diff/1/gyp/skflate.gyp#newcode11
gyp/skflate.gyp:11: # When zlib is not availible on a system,
If this works out, might consider using miniz everywhere for our builds?  It's
API compatible with zlib, right?

https://codereview.chromium.org/469813002/diff/1/src/core/SkFlate.cpp
File src/core/SkFlate.cpp (right):

https://codereview.chromium.org/469813002/diff/1/src/core/SkFlate.cpp#newcode34
src/core/SkFlate.cpp:34: #include SK_ZLIB_INCLUDE
Can we do this so that SK_ZLIB_INCLUDE is defined to miniz.c?

https://codereview.chromium.org/469813002/diff/1/third_party/miniz/miniz.gyp
File third_party/miniz/miniz.gyp (right):

https://codereview.chromium.org/469813002/diff/1/third_party/miniz/miniz.gyp#...
third_party/miniz/miniz.gyp:2: 'targets': [
Do we ever build this library?  Doesn't miniz.c just get included into
SkFlate.cpp?

[hal.canary, 2014-08-13 18:04:24]

https://codereview.chromium.org/469813002/diff/1/gyp/skflate.gyp
File gyp/skflate.gyp (right):

https://codereview.chromium.org/469813002/diff/1/gyp/skflate.gyp#newcode11
gyp/skflate.gyp:11: # When zlib is not availible on a system,
On 2014/08/13 17:57:09, mtklein wrote:
> If this works out, might consider using miniz everywhere for
> our builds?  It's API compatible with zlib, right?

Yes but Chromium and Android still use zlib everywhere.  Shouldn't we test that
when it is availible?

https://codereview.chromium.org/469813002/diff/1/third_party/miniz/miniz.gyp
File third_party/miniz/miniz.gyp (right):

https://codereview.chromium.org/469813002/diff/1/third_party/miniz/miniz.gyp#...
third_party/miniz/miniz.gyp:2: 'targets': [
On 2014/08/13 17:57:09, mtklein wrote:
> Do we ever build this library?  Doesn't miniz.c just get
> included into SkFlate.cpp?

Since we define MINIZ_HEADER_FILE_ONLY, most of the .c file is ignored when
included.

[hal.canary, 2014-08-13 18:57:13]

((Putting this on ice for a while))