Update V8 to r7427: Fix ENABLE_LOGGING_AND_PROFILING guards

Partial cherry-pick of
http://code.google.com/p/v8/source/detail?r=8113 pulled into trunk in
http://code.google.com/p/v8/source/detail?r=8130

We can't cherry-pick the entire change because it touches code we
don't yet have. The change to top.cc is taken from the patch for
isolate.cc, to where this code has now moved.

Change-Id: I06a98ff82221a5a9bf64253f7dc5730a2ba603a6
4 files changed