arc: Partially migrate mojo types

components/arc/crash_collector/arc_crash_collector_bridge.cc

 // Copyright 2016 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 "components/arc/crash_collector/arc_crash_collector_bridge.h"
 
 #include <sysexits.h>
 #include <unistd.h>
 
 #include <utility>
@@ skipping 52 matching lines @@
 
 void ArcCrashCollectorBridge::OnInstanceReady() {
   mojom::CrashCollectorHostPtr host_ptr;
   binding_.Bind(mojo::GetProxy(&host_ptr));
   auto* instance =
       arc_bridge_service()->crash_collector()->GetInstanceForMethod("Init");
   DCHECK(instance);
   instance->Init(std::move(host_ptr));
 }
 
-void ArcCrashCollectorBridge::DumpCrash(const mojo::String& type,
+void ArcCrashCollectorBridge::DumpCrash(const std::string& type,
                                         mojo::ScopedHandle pipe) {
   mojo::edk::ScopedPlatformHandle pipe_handle;
   mojo::edk::PassWrappedPlatformHandle(pipe.release().value(), &pipe_handle);
 
   blocking_task_runner_->PostTask(
       FROM_HERE, base::Bind(&RunCrashReporter, type, device_, board_, cpu_abi_,
                             base::Passed(std::move(pipe_handle))));
 }
 
-void ArcCrashCollectorBridge::SetBuildProperties(const mojo::String& device,
-                                                 const mojo::String& board,
-                                                 const mojo::String& cpu_abi) {
-  device_ = device.get();
-  board_ = board.get();
-  cpu_abi_ = cpu_abi.get();
+void ArcCrashCollectorBridge::SetBuildProperties(const std::string& device,
+                                                 const std::string& board,
+                                                 const std::string& cpu_abi) {
+  device_ = device;
+  board_ = board;
+  cpu_abi_ = cpu_abi;
 }
 
 }  // namespace arc