Implemented attestation message flow for Chrome OS.

chromeos/cryptohome/mock_async_method_caller.h

Index: chromeos/cryptohome/mock_async_method_caller.h
diff --git a/chromeos/cryptohome/mock_async_method_caller.h b/chromeos/cryptohome/mock_async_method_caller.h
index 37bc0c445d232e044521f2955f79f0470636fc9a..2e8d3528586d3c29cbf82365416ba1630552b19c 100644
--- a/chromeos/cryptohome/mock_async_method_caller.h
+++ b/chromeos/cryptohome/mock_async_method_caller.h
@@ -16,6 +16,10 @@ namespace cryptohome {
 
 class MockAsyncMethodCaller : public AsyncMethodCaller {
  public:
+  static const char kFakeAttestationEnrollRequest[];
+  static const char kFakeAttestationCertRequest[];
+  static const char kFakeAttestationCert[];
+
   MockAsyncMethodCaller();
   virtual ~MockAsyncMethodCaller();
 
@@ -50,6 +54,10 @@ class MockAsyncMethodCaller : public AsyncMethodCaller {
   MountError return_code_;
 
   void DoCallback(Callback callback);
+  // Default fakes for attestation calls.
+  void FakeCreateEnrollRequest(const DataCallback& callback);
+  void FakeCreateCertRequest(const DataCallback& callback);
+  void FakeFinishCertRequest(const DataCallback& callback);
 
   DISALLOW_COPY_AND_ASSIGN(MockAsyncMethodCaller);
 };