arc: Partially migrate mojo types

components/arc/clipboard/arc_clipboard_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/clipboard/arc_clipboard_bridge.h"
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_checker.h"
 #include "components/arc/arc_bridge_service.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/clipboard/clipboard_types.h"
 #include "ui/base/clipboard/scoped_clipboard_writer.h"
 
-namespace {
-
-static base::string16 ConvertMojoStringToString16(const mojo::String& input) {
-  return base::UTF8ToUTF16(input.get());
-}
-
-static mojo::String ConvertString16ToMojoString(const base::string16& input) {
-  return mojo::String(base::UTF16ToUTF8(input));
-}
-
-}  // namespace
-
 namespace arc {
 
 ArcClipboardBridge::ArcClipboardBridge(ArcBridgeService* bridge_service)
     : ArcService(bridge_service), binding_(this) {
   arc_bridge_service()->clipboard()->AddObserver(this);
 }
 
 ArcClipboardBridge::~ArcClipboardBridge() {
   DCHECK(CalledOnValidThread());
   arc_bridge_service()->clipboard()->RemoveObserver(this);
 }
 
 void ArcClipboardBridge::OnInstanceReady() {
   mojom::ClipboardInstance* clipboard_instance =
       arc_bridge_service()->clipboard()->GetInstanceForMethod("Init");
   DCHECK(clipboard_instance);
   clipboard_instance->Init(binding_.CreateInterfacePtrAndBind());
 }
 
-void ArcClipboardBridge::SetTextContent(const mojo::String& text) {
+void ArcClipboardBridge::SetTextContent(const std::string& text) {
   DCHECK(CalledOnValidThread());
   ui::ScopedClipboardWriter writer(ui::CLIPBOARD_TYPE_COPY_PASTE);
-  writer.WriteText(ConvertMojoStringToString16(text));
+  writer.WriteText(base::UTF8ToUTF16(text));
 }
 
 void ArcClipboardBridge::GetTextContent() {
   DCHECK(CalledOnValidThread());
 
   base::string16 text;
   ui::Clipboard* clipboard = ui::Clipboard::GetForCurrentThread();
   clipboard->ReadText(ui::CLIPBOARD_TYPE_COPY_PASTE, &text);
 
   mojom::ClipboardInstance* clipboard_instance =
       arc_bridge_service()->clipboard()->GetInstanceForMethod(
           "OnGetTextContent");
   if (!clipboard_instance)
     return;
-  clipboard_instance->OnGetTextContent(ConvertString16ToMojoString(text));
+  clipboard_instance->OnGetTextContent(base::UTF16ToUTF8(text));
 }
 
 bool ArcClipboardBridge::CalledOnValidThread() {
   // Make sure access to the Chrome clipboard is happening in the UI thread.
   return thread_checker_.CalledOnValidThread();
 }
 
 }  // namespace arc