Use an enum of Flags internally in CompilationInfo.

Use an enum of Flags internally in CompilationInfo.

This is a first step in cleaning up CompilationInfo; a subsequent logical step
would be to inline most is_* and Set* and Mark* calls so that most callers
can use call info.SetFlag(CompilationInfo::kMyFlag), or at the very least,
rename them all to be consistent with their enum flag names.

R=yangguo@chromium.org, bmeuer@chromium.org
BUG=

Committed: https://code.google.com/p/v8/source/detail?r=23408

[Yang, 2014-08-26 14:31:32]

On 2014/08/26 14:26:11, titzer wrote:

lgtm.

[titzer, 2014-08-26 14:42:06]

Committed patchset #1 manually as 23408 (presubmit successful).