Remove implicit conversions from scoped_refptr to T* in mojo/

mojo/system/handle_table.cc

Index: mojo/system/handle_table.cc
diff --git a/mojo/system/handle_table.cc b/mojo/system/handle_table.cc
index 5281655336b223d93fab506c94dd5184b05f89ea..e05e365f242614bf96fc5b38d2d64461a59dd5e7 100644
--- a/mojo/system/handle_table.cc
+++ b/mojo/system/handle_table.cc
@@ -37,7 +37,7 @@ Dispatcher* HandleTable::GetDispatcher(MojoHandle handle) {
   HandleToEntryMap::iterator it = handle_to_entry_map_.find(handle);
   if (it == handle_to_entry_map_.end())
     return NULL;
-  return it->second.dispatcher;
+  return it->second.dispatcher.get();
 }
 
 MojoResult HandleTable::GetAndRemoveDispatcher(
@@ -89,7 +89,7 @@ bool HandleTable::AddDispatcherVector(const DispatcherVector& dispatchers,
     return false;
 
   for (size_t i = 0; i < dispatchers.size(); i++) {
-    if (dispatchers[i]) {
+    if (dispatchers[i].get()) {
       handles[i] = AddDispatcherNoSizeCheck(dispatchers[i]);
     } else {
       LOG(WARNING) << "Invalid dispatcher at index " << i;
@@ -186,7 +186,7 @@ MojoResult HandleTable::MarkBusyAndStartTransport(
 
 MojoHandle HandleTable::AddDispatcherNoSizeCheck(
     const scoped_refptr<Dispatcher>& dispatcher) {
-  DCHECK(dispatcher);
+  DCHECK(dispatcher.get());
   DCHECK_LT(handle_to_entry_map_.size(), kMaxHandleTableSize);
   DCHECK_NE(next_handle_, MOJO_HANDLE_INVALID);