components: Add Exosphere component.

chrome/browser/chrome_browser_main_extra_parts_exo.h

+// 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.
+
+#ifndef CHROME_BROWSER_CHROME_BROWSER_MAIN_EXTRA_PARTS_EXO_H_
+#define CHROME_BROWSER_CHROME_BROWSER_MAIN_EXTRA_PARTS_EXO_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/chrome_browser_main_extra_parts.h"
+
+namespace exo {
+class Display;
+#if defined(ENABLE_WAYLAND_SERVER)

[sky, 2015/11/19 17:55:35]

Isn't this code only compiled if ENABLE_WAYLAND_SERVER is set? In other words,
why do you need the ifdefs?

[reveman, 2015/11/19 18:42:03]

No longer needed. Removed them from latest patch. We'll just need to add them
back later when introducing ENABLE_XYZ_SERVER...

FYI, previously I had all code in this patch compiling that could be compiled
but it seemed unnecessary to build all this non-wayland specific code if it was
currently only used when wayland is enabled. Hence, the higher level
ENABLE_WAYLAND_SERVER checks that are not really needed.

+namespace wayland {
+class Server;
+}
+#endif
+}
+
+class ChromeBrowserMainExtraPartsExo : public ChromeBrowserMainExtraParts {
+ public:
+  ChromeBrowserMainExtraPartsExo();
+  ~ChromeBrowserMainExtraPartsExo() override;
+
+  // Overridden from ChromeBrowserMainExtraParts:
+  void PreProfileInit() override;
+  void PostMainMessageLoopRun() override;
+
+ private:
+  scoped_ptr<exo::Display> display_;
+#if defined(ENABLE_WAYLAND_SERVER)
+  scoped_ptr<exo::wayland::Server> wayland_server_;
+  class WaylandWatcher;
+  scoped_ptr<WaylandWatcher> wayland_watcher_;
+#endif
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainExtraPartsExo);
+};
+
+#endif  // CHROME_BROWSER_CHROME_BROWSER_MAIN_EXTRA_PARTS_EXO_H_