Add SK_ALWAYS_INLINE.

I'm working on some code that's much faster when compiled by GCC than by Clang
because GCC inlines more aggressively.  Using SK_ATTRIBUTE(always_inline) on
the appropriate methods narrows the performance gap considerably.

This should work for MSVC, GCC, and Clang, otherwise falling back to "inline".

BUG=
R=reed@google.com

Review URL: https://codereview.chromium.org/83333005

git-svn-id: http://skia.googlecode.com/svn/trunk@12364 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed