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diff --git a/include/clang/Frontend/ChainedDiagnosticConsumer.h b/include/clang/Frontend/ChainedDiagnosticConsumer.h
new file mode 100644
index 000000000000..f20cf6fcf4f2
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+++ b/include/clang/Frontend/ChainedDiagnosticConsumer.h
@@ -0,0 +1,67 @@
+//===- ChainedDiagnosticConsumer.h - Chain Diagnostic Clients ---*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_FRONTEND_CHAINEDDIAGNOSTICCONSUMER_H
+#define LLVM_CLANG_FRONTEND_CHAINEDDIAGNOSTICCONSUMER_H
+
+#include "clang/Basic/Diagnostic.h"
+#include "llvm/ADT/OwningPtr.h"
+
+namespace clang {
+class LangOptions;
+
+/// ChainedDiagnosticConsumer - Chain two diagnostic clients so that diagnostics
+/// go to the first client and then the second. The first diagnostic client
+/// should be the "primary" client, and will be used for computing whether the
+/// diagnostics should be included in counts.
+class ChainedDiagnosticConsumer : public DiagnosticConsumer {
+  llvm::OwningPtr<DiagnosticConsumer> Primary;
+  llvm::OwningPtr<DiagnosticConsumer> Secondary;
+
+public:
+  ChainedDiagnosticConsumer(DiagnosticConsumer *_Primary,
+                          DiagnosticConsumer *_Secondary) {
+    Primary.reset(_Primary);
+    Secondary.reset(_Secondary);
+  }
+
+  virtual void BeginSourceFile(const LangOptions &LO,
+                               const Preprocessor *PP) {
+    Primary->BeginSourceFile(LO, PP);
+    Secondary->BeginSourceFile(LO, PP);
+  }
+
+  virtual void EndSourceFile() {
+    Secondary->EndSourceFile();
+    Primary->EndSourceFile();
+  }
+
+  virtual bool IncludeInDiagnosticCounts() const {
+    return Primary->IncludeInDiagnosticCounts();
+  }
+
+  virtual void HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
+                                const Diagnostic &Info) {
+    // Default implementation (Warnings/errors count).
+    DiagnosticConsumer::HandleDiagnostic(DiagLevel, Info);
+
+    Primary->HandleDiagnostic(DiagLevel, Info);
+    Secondary->HandleDiagnostic(DiagLevel, Info);
+  }
+  
+  DiagnosticConsumer *clone(DiagnosticsEngine &Diags) const {
+    return new ChainedDiagnosticConsumer(Primary->clone(Diags), 
+                                         Secondary->clone(Diags));
+  }
+
+};
+
+} // end namspace clang
+
+#endif