Use FrameTreeNode ID as frameId in extension APIs

chrome/browser/extensions/api/messaging/native_message_port.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 "chrome/browser/extensions/api/messaging/native_message_port.h"
 
 #include "base/bind.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "chrome/browser/extensions/api/messaging/native_message_process_host.h"
@@ skipping 82 matching lines @@
   core_.reset(new Core(native_message_host.Pass(),
                        weak_factory_.GetWeakPtr(),
                        base::ThreadTaskRunnerHandle::Get()));
 }
 
 NativeMessagePort::~NativeMessagePort() {
   DCHECK(thread_checker_.CalledOnValidThread());
   host_task_runner_->DeleteSoon(FROM_HERE, core_.release());
 }
 
-void NativeMessagePort::DispatchOnMessage(
-    const Message& message,
-    int target_port_id) {
+bool NativeMessagePort::IsValidPort() {
+  // The native message port is immediately connected after construction, so it
+  // is not possible to invalidate the port between construction and connection.
+  // The return value doesn't matter since native messaging follows a code path
+  // where IsValidPort() is never called.
+  NOTREACHED();
+  return true;
+}
+
+void NativeMessagePort::DispatchOnMessage(const Message& message) {
   DCHECK(thread_checker_.CalledOnValidThread());
   core_->OnMessageFromChrome(message.data);
 }
 
 void NativeMessagePort::PostMessageFromNativeHost(const std::string& message) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (weak_message_service_) {
     weak_message_service_->PostMessage(
         port_id_, Message(message, false /* user_gesture */));
   }
 }
 
 void NativeMessagePort::CloseChannel(const std::string& error_message) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (weak_message_service_) {
     weak_message_service_->CloseChannel(port_id_, error_message);
   }
 }
 
 }  // namespace extensions