Bind Application in renderer

content/browser/mojo/mojo_shell_client_host.cc

+// Copyright 2015 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 "base/thread_task_runner_handle.h"
+#include "content/browser/mojo/mojo_shell_client_host.h"
+#include "content/common/mojo/mojo_messages.h"
+#include "content/public/common/mojo_shell_connection.h"
+#include "ipc/ipc_sender.h"
+#include "mojo/application/public/cpp/application_impl.h"
+#include "mojo/converters/network/network_type_converters.h"
+#include "mojo/shell/application_manager.mojom.h"
+#include "third_party/mojo/src/mojo/edk/embedder/embedder.h"
+#include "third_party/mojo/src/mojo/edk/embedder/platform_channel_pair.h"
+#include "third_party/mojo/src/mojo/edk/embedder/scoped_platform_handle.h"
+
+namespace content {
+namespace {
+void DidCreateChannel(mojo::embedder::ChannelInfo* info) {}
+
+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
+
+void RegisterChildWithExternalShell(int child_process_id,
+                                    base::ProcessHandle process_handle,
+                                    IPC::Sender* sender) {
+  // Some process types get created before the main message loop.
+  if (!MojoShellConnection::Get())
+    return;
+
+  // Create the channel to be shared with the target process.
+  mojo::embedder::HandlePassingInformation handle_passing_info;
+  mojo::embedder::PlatformChannelPair platform_channel_pair;
+
+  // Give one end to the shell so that it can create an instance.
+  mojo::embedder::ScopedPlatformHandle platform_channel =
+      platform_channel_pair.PassServerHandle();
+  mojo::ScopedMessagePipeHandle handle(mojo::embedder::CreateChannel(
+      platform_channel.Pass(), base::Bind(&DidCreateChannel),
+      base::ThreadTaskRunnerHandle::Get()));
+  mojo::shell::mojom::ApplicationManagerPtr application_manager;
+  MojoShellConnection::Get()->GetApplication()->ConnectToService(
+      mojo::URLRequest::From(std::string("mojo:shell")),
+      &application_manager);
+  // The content of the URL/qualifier we pass is actually meaningless, it's only
+  // important that they're unique per process.
+  // TODO(beng): We need to specify a restrictive CapabilityFilter here that
+  //             matches the needs of the target process. Figure out where that
+  //             specification is best determined (not here, this is a common
+  //             chokepoint for all process types) and how to wire it through.
+  //             http://crbug.com/555393
+  application_manager->CreateInstanceForHandle(
+      mojo::ScopedHandle(mojo::Handle(handle.release().value())),
+      "exe:chrome_renderer",  // See above about how this string is meaningless.
+      base::IntToString(child_process_id));
+
+  // Send the other end to the child via Chrome IPC.
+  base::PlatformFile client_file = PlatformFileFromScopedPlatformHandle(
+      platform_channel_pair.PassClientHandle());
+  sender->Send(new MojoMsg_BindExternalMojoShellHandle(
+      IPC::GetFileHandleForProcess(client_file, process_handle, true)));
+}
+
+}  // namespace content