Re-enable default sized formats, handling BGRA exception.

Sized texture formats are accepted by OpenGL desktop and ES 3.0,
except when using BGRA with GL_EXT_texture_format_BGRA8888.
In that case we fall back to using the unsized format.

Review URL: https://codereview.chromium.org/811133002
Mark flaky gm as ignore-failure on mac 10.9

BUG=skia:3256

Review URL: https://codereview.chromium.org/803443005
Add new complexclip3 gm.

This GM is used to test the combined clipping of a complex clip (packman shape)
and a simple one (circle). We loop over all combinations of clip ops, aa/bw clip,
and inverse/non-inverse clips.

This GM triggers a current bug in the gpu clipping code which fires an assert. Thus
the skipGPU flag is set until that bug is fixed.

BUG=skia:

Review URL: https://codereview.chromium.org/798793003
Turn off warnings as errors for the debugger

Compiling the debugger on Linux was running afoul of warnings-as-errors

Review URL: https://codereview.chromium.org/812673004
rebaseline after perspective/conic change

BUG=skia:
TBR=
NOTRY=True

Review URL: https://codereview.chromium.org/812863002