mojo: Make InterfacePtr<> testable in if() statements without .get().

mojo/public/cpp/bindings/tests/handle_passing_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/public/cpp/environment/environment.h"
 #include "mojo/public/cpp/test_support/test_utils.h"
 #include "mojo/public/cpp/utility/run_loop.h"
 #include "mojo/public/interfaces/bindings/tests/sample_factory.mojom.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 76 matching lines @@
     if (!text2.empty()) {
       CreateMessagePipe(NULL, &pipe0, &pipe1_);
       EXPECT_TRUE(WriteTextMessage(pipe1_.get(), text2));
     }
 
     sample::ResponsePtr response(sample::Response::New());
     response->x = 2;
     response->pipe = pipe0.Pass();
     client()->DidStuff(response.Pass(), text1);
 
-    if (request->obj.get())
+    if (request->obj)
       request->obj->DoSomething();
   }
 
   virtual void DoStuff2(ScopedDataPipeConsumerHandle pipe) MOJO_OVERRIDE {
     // Read the data from the pipe, writing the response (as a string) to
     // DidStuff2().
     ASSERT_TRUE(pipe.is_valid());
     uint32_t data_size = 0;
     ASSERT_EQ(MOJO_RESULT_OK,
               ReadDataRaw(pipe.get(), NULL, &data_size,
@@ skipping 220 matching lines @@
   EXPECT_FALSE(internal::IsHandle<int>::value);
   EXPECT_FALSE(internal::IsHandle<sample::FactoryPtr>::value);
   EXPECT_FALSE(internal::IsHandle<String>::value);
 }
 
 TEST_F(HandlePassingTest, CreateNamedObject) {
   sample::FactoryPtr factory;
   BindToProxy(new SampleFactoryImpl(), &factory);
 
   sample::NamedObjectPtr object1;
-  EXPECT_FALSE(object1.get());
+  EXPECT_FALSE(object1);
 
   InterfaceRequest<sample::NamedObject> object1_request = Get(&object1);
   EXPECT_TRUE(object1_request.is_pending());
   factory->CreateNamedObject(object1_request.Pass());
   EXPECT_FALSE(object1_request.is_pending());  // We've passed the request.
 
-  ASSERT_TRUE(object1.get());
+  ASSERT_TRUE(object1);
   object1->SetName("object1");
 
   sample::NamedObjectPtr object2;
   factory->CreateNamedObject(Get(&object2));
   object2->SetName("object2");
 
   std::string name1;
   object1->GetName(StringRecorder(&name1));
 
   std::string name2;
   object2->GetName(StringRecorder(&name2));
 
   PumpMessages();  // Yield for results.
 
   EXPECT_EQ(std::string("object1"), name1);
   EXPECT_EQ(std::string("object2"), name2);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo