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

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

Index: mojo/public/cpp/bindings/tests/interface_ptr_unittest.cc
diff --git a/mojo/public/cpp/bindings/tests/interface_ptr_unittest.cc b/mojo/public/cpp/bindings/tests/interface_ptr_unittest.cc
index 8f1de632dee82a32874a97f8733485fbb9dbc1e3..533d990ee9afe7401376169940a0d141b2652cb0 100644
--- a/mojo/public/cpp/bindings/tests/interface_ptr_unittest.cc
+++ b/mojo/public/cpp/bindings/tests/interface_ptr_unittest.cc
@@ -252,19 +252,19 @@ TEST_F(InterfacePtrTest, Movable) {
   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;
 
@@ -273,11 +273,11 @@ TEST_F(InterfacePtrTest, Resettable) {
 
   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.