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

mojo/gles2/command_buffer_client_impl.cc

 // Copyright 2014 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/gles2/command_buffer_client_impl.h"
 
 #include <limits>
 
 #include "base/logging.h"
 #include "base/process/process_handle.h"
@@ skipping 270 matching lines @@
 
 void CommandBufferClientImpl::TryUpdateState() {
   if (last_state_.error == gpu::error::kNoError)
     shared_state()->Read(&last_state_);
 }
 
 void CommandBufferClientImpl::MakeProgressAndUpdateState() {
   command_buffer_->MakeProgress(last_state_.get_offset);
 
   CommandBufferStatePtr state = sync_client_impl_->WaitForProgress();
-  if (!state.get()) {
+  if (!state) {
     VLOG(1) << "Channel encountered error while waiting for command buffer";
     // TODO(piman): is it ok for this to re-enter?
     DidDestroy();
     return;
   }
 
   if (state->generation - last_state_.generation < 0x80000000U)
     last_state_ = state.To<State>();
 }
 
 }  // namespace gles2
 }  // namespace mojo