First attempt to capture parser/translation errors in browser.

src/IceGlobalContext.cpp

Index: src/IceGlobalContext.cpp
diff --git a/src/IceGlobalContext.cpp b/src/IceGlobalContext.cpp
index 1c9e3c4eccdd52e0905dac1279e35dced6cd0e20..68280eb81885323aaf02bcbd5ce12077bbbee658 100644
--- a/src/IceGlobalContext.cpp
+++ b/src/IceGlobalContext.cpp
@@ -214,9 +214,11 @@ void GlobalContext::CodeStats::dump(const IceString &Name, Ostream &Str) {
 }
 
 GlobalContext::GlobalContext(Ostream *OsDump, Ostream *OsEmit,
-                             ELFStreamer *ELFStr, const ClFlags &Flags)
+                             ELFStreamer *ELFStr, const ClFlags &Flags,
+                             Ostream *OsError)
     : ConstPool(new ConstantPool()), ErrorStatus(), StrDump(OsDump),
-      StrEmit(OsEmit), Flags(Flags), RNG(Flags.getRandomSeed()), ObjectWriter(),
+      StrEmit(OsEmit), StrError(OsError), Flags(Flags),
+      RNG(Flags.getRandomSeed()), ObjectWriter(),
       OptQ(/*Sequential=*/Flags.isSequential(),
            /*MaxSize=*/Flags.getNumTranslationThreads()),
       // EmitQ is allowed unlimited size.
@@ -278,8 +280,8 @@ void GlobalContext::translateFunctions() {
     if (Func->hasError()) {
       getErrorStatus()->assign(EC_Translation);
       OstreamLocker L(this);
-      getStrDump() << "ICE translation error: " << Func->getFunctionName()
-                   << ": " << Func->getError() << "\n";
+      getStrError() << "ICE translation error: " << Func->getFunctionName()
+                    << ": " << Func->getError() << "\n";
       Item = new EmitterWorkItem(Func->getSequenceNumber());
     } else {
       Func->getAssembler<>()->setInternal(Func->getInternal());