Revert 258763 "Adds plumbing to pass WebUI mojo::Handle from bro..."

trunk/src/content/browser/renderer_host/render_process_host_mojo_impl.cc

-// Copyright 2014 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 "content/browser/renderer_host/render_process_host_mojo_impl.h"
-
-#include "base/platform_file.h"
-#include "content/common/mojo/mojo_channel_init.h"
-#include "content/common/mojo/mojo_messages.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/render_process_host.h"
-#include "mojo/embedder/platform_channel_pair.h"
-
-namespace content {
-
-namespace {
-
-base::PlatformFile PlatformFileFromScopedPlatformHandle(
-    mojo::embedder::ScopedPlatformHandle handle) {
-#if defined(OS_POSIX)
-  return handle.release().fd;
-#elif defined(OS_WIN)
-  return handle.release().handle;
-#endif
-}
-
-}  // namespace
-
-struct RenderProcessHostMojoImpl::PendingHandle {
-  PendingHandle() : view_routing_id(0) {}
-
-  int32 view_routing_id;
-  mojo::ScopedMessagePipeHandle handle;
-};
-
-RenderProcessHostMojoImpl::RenderProcessHostMojoImpl(RenderProcessHost* host)
-    : host_(host) {
-}
-
-RenderProcessHostMojoImpl::~RenderProcessHostMojoImpl() {
-}
-
-void RenderProcessHostMojoImpl::SetWebUIHandle(
-    int32 view_routing_id,
-    mojo::ScopedMessagePipeHandle handle) {
-  base::ProcessHandle process = host_->GetHandle();
-  if (process != base::kNullProcessHandle) {
-    CreateMojoChannel(process);  // Does nothing if already connected.
-    if (!render_process_mojo_.is_null()) {
-      render_process_mojo_->SetWebUIHandle(view_routing_id, handle.Pass());
-      return;
-    }
-  }
-
-  // Remember the request, we'll attempt to reconnect once the child process is
-  // launched.
-  pending_handle_.reset(new PendingHandle);
-  pending_handle_->view_routing_id = view_routing_id;
-  pending_handle_->handle = handle.Pass();
-}
-
-void RenderProcessHostMojoImpl::OnProcessLaunched() {
-  if (pending_handle_) {
-    scoped_ptr<PendingHandle> handle(pending_handle_.Pass());
-    SetWebUIHandle(handle->view_routing_id, handle->handle.Pass());
-  }
-}
-
-
-void RenderProcessHostMojoImpl::CreateMojoChannel(
-    base::ProcessHandle process_handle) {
-  if (mojo_channel_init_.get())
-    return;
-
-  mojo::embedder::PlatformChannelPair channel_pair;
-  mojo_channel_init_.reset(new MojoChannelInit);
-  mojo_channel_init_->Init(
-      PlatformFileFromScopedPlatformHandle(channel_pair.PassServerHandle()),
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
-  if (!mojo_channel_init_->is_handle_valid())
-    return;
-  base::PlatformFile client_file =
-      PlatformFileFromScopedPlatformHandle(channel_pair.PassClientHandle());
-  host_->Send(new MojoMsg_ChannelCreated(
-                  IPC::GetFileHandleForProcess(client_file, process_handle,
-                                               true)));
-  ScopedRenderProcessMojoHandle render_process_handle(
-      RenderProcessMojoHandle(
-          mojo_channel_init_->bootstrap_message_pipe().release().value()));
-  render_process_mojo_.reset(render_process_handle.Pass(), this);
-}
-
-}  // namespace content