First attempt to capture parser/translation errors in browser.

src/IceBrowserCompileServer.h

Index: src/IceBrowserCompileServer.h
diff --git a/src/IceBrowserCompileServer.h b/src/IceBrowserCompileServer.h
index 1ef8121ab1b1cd3a46283498f18a65d00262a80a..e19bb38a0b3c8b6c8874723ac5270cea8466b6b6 100644
--- a/src/IceBrowserCompileServer.h
+++ b/src/IceBrowserCompileServer.h
@@ -75,6 +75,16 @@ public:
   }
 
 private:
+  class StringStream {
+  public:
+    StringStream() : StrBuf(Buffer) {}
+    std::string getContents() { return StrBuf.str(); }
+    Ostream &getStream() { return StrBuf; }
+  private:
+    std::string Buffer;
+    llvm::raw_string_ostream StrBuf;
+  };
+
   // This currently only handles a single compile request, hence one copy
   // of the state.
   std::unique_ptr<GlobalContext> Ctx;
@@ -84,6 +94,7 @@ private:
   llvm::QueueStreamer *InputStream;
   std::unique_ptr<Ostream> LogStream;
   std::unique_ptr<llvm::raw_fd_ostream> EmitStream;
+  std::unique_ptr<StringStream> ErrorStream;
   std::unique_ptr<ELFStreamer> ELFStream;
   ClFlags Flags;
   ClFlagsExtra ExtraFlags;