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

mojo/public/cpp/bindings/tests/interface_ptr_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/bindings/error_handler.h"
 #include "mojo/public/cpp/environment/environment.h"
 #include "mojo/public/cpp/utility/run_loop.h"
 #include "mojo/public/interfaces/bindings/tests/math_calculator.mojom.h"
 #include "mojo/public/interfaces/bindings/tests/sample_service.mojom.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 234 matching lines @@
   impl->WaitForIncomingMethodCall();
   calculator_ui.WaitForIncomingMethodCall();
   EXPECT_EQ(10.0, calculator_ui.GetOutput());
 }
 
 TEST_F(InterfacePtrTest, Movable) {
   math::CalculatorPtr a;
   math::CalculatorPtr b;
   BindToProxy(new MathCalculatorImpl(), &b);
 
-  EXPECT_TRUE(!a.get());
-  EXPECT_FALSE(!b.get());
+  EXPECT_TRUE(!a);
+  EXPECT_FALSE(!b);
 
   a = b.Pass();
 
-  EXPECT_FALSE(!a.get());
-  EXPECT_TRUE(!b.get());
+  EXPECT_FALSE(!a);
+  EXPECT_TRUE(!b);
 }
 
 TEST_F(InterfacePtrTest, Resettable) {
   math::CalculatorPtr a;
 
-  EXPECT_TRUE(!a.get());
+  EXPECT_TRUE(!a);
 
   MessagePipe pipe;
 
   // Save this so we can test it later.
   Handle handle = pipe.handle0.get();
 
   a = MakeProxy<math::Calculator>(pipe.handle0.Pass());
 
-  EXPECT_FALSE(!a.get());
+  EXPECT_FALSE(!a);
 
   a.reset();
 
-  EXPECT_TRUE(!a.get());
+  EXPECT_TRUE(!a);
   EXPECT_FALSE(a.internal_state()->router_for_testing());
 
   // Test that handle was closed.
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT, CloseRaw(handle));
 }
 
 TEST_F(InterfacePtrTest, EncounteredError) {
   math::CalculatorPtr proxy;
   MathCalculatorImpl* server = BindToProxy(new MathCalculatorImpl(), &proxy);
 
@@ skipping 103 matching lines @@
                    sample::PortPtr());
 
   PumpMessages();
 
   EXPECT_EQ(2, impl->max_call_depth());
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo