Revert to enabling all of -O2 as it exposes a bug in the toolchain.

Revert to enabling all of -O2 as it exposes a bug in the toolchain.

Instead as a workaround we will temporarily disable tiling the
few GMs that produce errors with the existing 64-bit ARM toolchain.

BUG=skia:2908
Committed: https://skia.googlesource.com/skia/+/6233c7b2d3f0b5dcc331e88d8029523bdf08217a

[djsollen, 2014-09-03 20:20:34]

djsollen@google.com changed reviewers:
+ mtklein@google.com

[mtklein, 2014-09-03 20:24:13]

lgtm

https://codereview.chromium.org/537713002/diff/1/gm/bitmaprect.cpp
File gm/bitmaprect.cpp (right):

https://codereview.chromium.org/537713002/diff/1/gm/bitmaprect.cpp#newcode51
gm/bitmaprect.cpp:51: return this->INHERITED::onGetFlags() |
GM::kSkipTiled_Flag;
Seems fine, but all these can just be

return kSkipTiled_Flag;

[djsollen, 2014-09-03 20:30:28]

The CQ bit was checked by djsollen@google.com

[commit-bot: I haz the power, 2014-09-03 20:30:56]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/djsollen@google.com/537713002/20001

[commit-bot: I haz the power, 2014-09-03 20:38:35]

Committed patchset #2 (id:20001) as 6233c7b2d3f0b5dcc331e88d8029523bdf08217a