First attempt to capture parser/translation errors in browser.

unittest/BitcodeMunge.cpp

Index: unittest/BitcodeMunge.cpp
diff --git a/unittest/BitcodeMunge.cpp b/unittest/BitcodeMunge.cpp
index 689279ea6c3531f215d8ce038a07b15aa972ec06..d258343380d41415d8016f20adda17bd804f7d30 100644
--- a/unittest/BitcodeMunge.cpp
+++ b/unittest/BitcodeMunge.cpp
@@ -38,7 +38,7 @@ bool IceTest::SubzeroBitcodeMunger::runTest(const char *TestName,
                                             size_t MungeSize) {
   const bool AddHeader = true;
   setupTest(TestName, Munges, MungeSize, AddHeader);
-  Ice::GlobalContext Ctx(DumpStream, DumpStream, nullptr, Flags);
+  Ice::GlobalContext Ctx(DumpStream, DumpStream, DumpStream, nullptr, Flags);
   Ice::PNaClTranslator Translator(&Ctx);
   Translator.translateBuffer(TestName, MungedInput.get());