[PATCH] Switch ASan to use ThreadRegistry from sanitizer_common.

[Kostya Serebryany]

================
Comment at: lib/asan/asan_report.cc:333
@@ +332,3 @@
+  asanThreadRegistry().CheckLocked();
+  AsanThreadContext *t = static_cast<AsanThreadContext*>(
+      asanThreadRegistry().GetThreadLocked(tid));
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can you get rid of these ugly static casts? 
perhaps by overriding GetThreadLocked to return a proper type.


http://llvm-reviews.chandlerc.com/D555