arc: Revamp the ArcBridgeService interface

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 <utility>
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 11 matching lines @@
 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()->AddObserver(this);
+  arc_bridge_service()->clipboard()->AddObserver(this);
 }
 
 ArcClipboardBridge::~ArcClipboardBridge() {
   DCHECK(CalledOnValidThread());
-  arc_bridge_service()->RemoveObserver(this);
+  arc_bridge_service()->clipboard()->RemoveObserver(this);
 }
 
-void ArcClipboardBridge::OnClipboardInstanceReady() {
-  mojom::ClipboardInstance* clipboard_instance =
-      arc_bridge_service()->clipboard_instance();
-  if (!clipboard_instance) {
-    LOG(ERROR) << "OnClipboardInstanceReady called, "
-               << "but no clipboard instance found";
-    return;
-  }
-
+void ArcClipboardBridge::OnInstanceReady(
+    mojom::ClipboardInstance* clipboard_instance,
+    uint32_t version) {
   clipboard_instance->Init(binding_.CreateInterfacePtrAndBind());
 }
 
 void ArcClipboardBridge::SetTextContent(const mojo::String& text) {
   DCHECK(CalledOnValidThread());
   ui::ScopedClipboardWriter writer(ui::CLIPBOARD_TYPE_COPY_PASTE);
   writer.WriteText(ConvertMojoStringToString16(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_instance();
+      arc_bridge_service()->clipboard()->instance();
   clipboard_instance->OnGetTextContent(ConvertString16ToMojoString(text));
 }
 
 bool ArcClipboardBridge::CalledOnValidThread() {
   // Make sure access to the Chrome clipboard is happening in the UI thread.
   return thread_checker_.CalledOnValidThread();
 }
 
 }  // namespace arc