Update ppapi/ to use scoped_refptr<T>::get() rather than implicit "operator T*"

ppapi/shared_impl/var_tracker.cc

 // Copyright (c) 2012 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 "ppapi/shared_impl/var_tracker.h"
 
 #include <string.h>
 
 #include <limits>
 
@@ skipping 181 matching lines @@
 
 VarTracker::VarMap::const_iterator VarTracker::GetLiveVar(
     const PP_Var& var) const {
   return live_vars_.find(static_cast<int32>(var.value.as_id));
 }
 
 PP_Var VarTracker::MakeArrayBufferPPVar(uint32 size_in_bytes) {
   CheckThreadingPreconditions();
 
   scoped_refptr<ArrayBufferVar> array_buffer(CreateArrayBuffer(size_in_bytes));
-  if (!array_buffer)
+  if (!array_buffer.get())
     return PP_MakeNull();
   return array_buffer->GetPPVar();
 }
 
 PP_Var VarTracker::MakeArrayBufferPPVar(uint32 size_in_bytes,
                                         const void* data) {
   CheckThreadingPreconditions();
 
   ArrayBufferVar* array_buffer = MakeArrayBufferVar(size_in_bytes, data);
   return array_buffer ? array_buffer->GetPPVar() : PP_MakeNull();
 }
 
 ArrayBufferVar* VarTracker::MakeArrayBufferVar(uint32 size_in_bytes,
                                                const void* data) {
   CheckThreadingPreconditions();
 
   ArrayBufferVar* array_buffer(CreateArrayBuffer(size_in_bytes));
   if (!array_buffer)
     return NULL;
   memcpy(array_buffer->Map(), data, size_in_bytes);
   return array_buffer;
 }
 
 PP_Var VarTracker::MakeArrayBufferPPVar(uint32 size_in_bytes,
                                         base::SharedMemoryHandle handle) {
   CheckThreadingPreconditions();
 
   scoped_refptr<ArrayBufferVar> array_buffer(
       CreateShmArrayBuffer(size_in_bytes, handle));
-  if (!array_buffer)
+  if (!array_buffer.get())
     return PP_MakeNull();
   return array_buffer->GetPPVar();
 }
 
 std::vector<PP_Var> VarTracker::GetLiveVars() {
   CheckThreadingPreconditions();
 
   std::vector<PP_Var> var_vector;
   var_vector.reserve(live_vars_.size());
   for (VarMap::const_iterator iter = live_vars_.begin();
@@ skipping 16 matching lines @@
 bool VarTracker::DeleteObjectInfoIfNecessary(VarMap::iterator iter) {
   if (iter->second.ref_count != 0 ||
       iter->second.track_with_no_reference_count != 0)
     return false;  // Object still alive.
   iter->second.var->ResetVarID();
   live_vars_.erase(iter);
   return true;
 }
 
 }  // namespace ppapi