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

mojo/public/cpp/bindings/tests/handle_passing_unittest.cc

Index: mojo/public/cpp/bindings/tests/handle_passing_unittest.cc
diff --git a/mojo/public/cpp/bindings/tests/handle_passing_unittest.cc b/mojo/public/cpp/bindings/tests/handle_passing_unittest.cc
index ab2e47506cc4d7192398be09df6da1bca38022e7..d2e287f73dfc2df260cd02fd1688074cc4962ebe 100644
--- a/mojo/public/cpp/bindings/tests/handle_passing_unittest.cc
+++ b/mojo/public/cpp/bindings/tests/handle_passing_unittest.cc
@@ -94,7 +94,7 @@ class SampleFactoryImpl : public InterfaceImpl<sample::Factory> {
     response->pipe = pipe0.Pass();
     client()->DidStuff(response.Pass(), text1);
 
-    if (request->obj.get())
+    if (request->obj)
       request->obj->DoSomething();
   }
 
@@ -335,14 +335,14 @@ TEST_F(HandlePassingTest, CreateNamedObject) {
   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;