Make all tests pass ASAN.
Make all tests pass ASAN.

Unpoison additional locations touched by profiler's stack walking.
Use return value of Isolate::GetProfilerStackBounds.

Commands to build and test:

export CXX="third_party/clang/linux/bin/clang++ -fsanitize=address -fPIC"

gclient runhooks

./tools/build.py -m debug -a x64 runtime

ASAN_OPTIONS=handle_segv=0 python tools/test.py --report --time --mode=debug --arch=x64 --compiler=none --runtime=vm --failure-summary --write-debug-log --write-test-outcome-log --copy-coredumps --exclude-suite=pkg --checked
R=iposva@google.com

Review URL: https://codereview.chromium.org//813163010

git-svn-id: c93d8a2297af3b929165606efe145742a534bc71@42635 260f80e4-7a28-3924-810f-c04153c831b5

dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk