components: Add Exosphere component.

chrome/browser/chrome_browser_main_extra_parts_exo.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 "chrome/browser/chrome_browser_main_extra_parts_exo.h"
+
+#include "base/command_line.h"
+#include "base/message_loop/message_loop.h"
+#include "chrome/browser/ui/ash/ash_util.h"
+#include "chrome/common/chrome_switches.h"
+#include "components/exo/display.h"
+#include "components/exo/wayland/server.h"
+#include "content/public/browser/browser_thread.h"
+
+class ChromeBrowserMainExtraPartsExo::WaylandWatcher
+    : public base::MessagePumpLibevent::Watcher {
+ public:
+  explicit WaylandWatcher(exo::wayland::Server* server) : server_(server) {
+    base::MessageLoopForUI::current()->WatchFileDescriptor(
+        server_->GetFileDescriptor(),
+        true,  // persistent
+        base::MessagePumpLibevent::WATCH_READ, &controller_, this);
+  }
+
+  // base::MessagePumpLibevent::Watcher:
+  void OnFileCanReadWithoutBlocking(int fd) override {
+    server_->Dispatch(base::TimeDelta());
+    server_->Flush();
+  }
+  void OnFileCanWriteWithoutBlocking(int fd) override { NOTREACHED(); }
+
+ private:
+  base::MessagePumpLibevent::FileDescriptorWatcher controller_;
+  exo::wayland::Server* const server_;
+
+  DISALLOW_COPY_AND_ASSIGN(WaylandWatcher);
+};
+
+ChromeBrowserMainExtraPartsExo::ChromeBrowserMainExtraPartsExo()
+    : display_(new exo::Display) {}
+
+ChromeBrowserMainExtraPartsExo::~ChromeBrowserMainExtraPartsExo() {}
+
+void ChromeBrowserMainExtraPartsExo::PreProfileInit() {
+  if (!chrome::ShouldOpenAshOnStartup())
+    return;
+
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableWaylandServer)) {
+    wayland_server_ = exo::wayland::Server::Create(display_.get());
+    wayland_watcher_ =
+        make_scoped_ptr(new WaylandWatcher(wayland_server_.get()));
+  }
+}
+
+void ChromeBrowserMainExtraPartsExo::PostMainMessageLoopRun() {
+  wayland_watcher_.reset();
+  wayland_server_.reset();
+}