Mojo: Add a "GetType()" to Dispatchers.

mojo/system/dispatcher_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/system/dispatcher.h"
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/simple_thread.h"
 #include "mojo/system/waiter.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace system {
 namespace {
 
 // Trivial subclass that makes the constructor public.
 class TrivialDispatcher : public Dispatcher {
  public:
   TrivialDispatcher() {}
 
+  virtual Type GetType() OVERRIDE {
+    return kTypeUnknown;
+  }
+
  private:
   friend class base::RefCountedThreadSafe<TrivialDispatcher>;
   virtual ~TrivialDispatcher() {}
 
   virtual scoped_refptr<Dispatcher>
       CreateEquivalentDispatcherAndCloseImplNoLock() OVERRIDE {
     return scoped_refptr<Dispatcher>(new TrivialDispatcher());
   }
 
   DISALLOW_COPY_AND_ASSIGN(TrivialDispatcher);
 };
 
 TEST(DispatcherTest, Basic) {
   scoped_refptr<Dispatcher> d(new TrivialDispatcher());
 
+  EXPECT_EQ(Dispatcher::kTypeUnknown, d->GetType());
+
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT,
             d->WriteMessage(NULL, 0, NULL, MOJO_WRITE_MESSAGE_FLAG_NONE));
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT,
             d->ReadMessage(NULL, NULL, NULL, NULL,
                            MOJO_WRITE_MESSAGE_FLAG_NONE));
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT,
             d->WriteData(NULL, NULL, MOJO_WRITE_DATA_FLAG_NONE));
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT,
             d->BeginWriteData(NULL, NULL, MOJO_WRITE_DATA_FLAG_NONE));
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT,
@@ skipping 193 matching lines @@
       event.Signal();  // Kicks off real work on the threads.
     }  // Joins all the threads.
 
     EXPECT_EQ(MOJO_RESULT_OK, d->Close());
   }
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo