Fix build for Mac.

The sync of gyp_xwalk with gyp_chromium 34 disabled the circular dependency check for
all platforms but Mac. Upstream doesn't have circular problems on the Mac platform
but we do so we need to skip the circular check for now. I also put back the TODO as
it was.
[Runtime] Fix Tizen IVI build error for PR#1593.
IVI buildbot reports error:
'xwalk::application_widget_keys::kIcon128Key' has a previous declaration
as 'const char xwalk::application_widget_keys::kIcon128Key []'

This PR fix above error.
DEPS.xwalk: Roll chromium-crosswalk to 954426

954426: Merge pull request #131 from yinli/volume-webaudio-trunk
[Android] [Backport] Volume is too low when playing audio through WebAud...
Merge pull request #1641 from yinli/roll_deps_to_webaudio_volume_fix

DEPS.xwalk: Roll chromium-crosswalk to 954426
Merge pull request #1639 from darktears/mac-build-fix

Fix build for Mac.
Merge pull request #1640 from shaochangbin/fix_build_error

[Runtime][IVI] Fix Tizen IVI build error by PR#1593.
Merge pull request #1637 from wang16/core_library_refine

[Android] Determine id for resources in chromium at runtime
Roll DEPS.xwalk to newer chromium hash.

This include the Mac build fix.
Merge pull request #1645 from darktears/roll

Roll DEPS.xwalk to newer chromium hash.
Fix build for Mac.

- Various clang erros.
- Fix the build of the sysapps unit tests grabbing dependencies not
needed (they will be included elsewhere) and guard the one needed
behind a conditional check of Aura (Mac doesn't use Aura).
Merge pull request #1644 from darktears/mac-build-fix

Fix build for Mac.
Bump version to 5.34.93.0
[Android] Check accessability before dynamically setting resource ids

When not used as Android Library, the resource ids in R.java will
be final. To avoid a lot of warning messages in such case, check
accessability before trying to set values.