Moves some files into mojo/common

mojo/common/handle_watcher.h

 // Copyright 2013 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 MOJO_SHELL_HANDLE_WATCHER_H_
-#define MOJO_SHELL_HANDLE_WATCHER_H_
+#ifndef MOJO_COMMON_HANDLE_WATCHER_H_
+#define MOJO_COMMON_HANDLE_WATCHER_H_
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/memory/scoped_ptr.h"
+#include "mojo/common/mojo_common_export.h"
 #include "mojo/public/system/core.h"
 
 namespace base {
 class Thread;
 class TickClock;
 class TimeTicks;
 }
 
 namespace mojo {
-namespace shell {
+namespace common {
 namespace test {
 class HandleWatcherTest;
 }
 
 // HandleWatcher is used to asynchronously wait on a handle and notify a Closure
 // when the handle is ready, or the deadline has expired.
-class HandleWatcher {
+class MOJO_COMMON_EXPORT HandleWatcher {
  public:
   HandleWatcher();
   ~HandleWatcher();
 
   // Starts listening for |handle|. This implicitly invokes Stop(). In other
   // words, Start() performs one asynchronous watch at a time. It is ok to call
   // Start() multiple times, but it cancels any existing watches. |callback| is
   // notified when the handle is ready, invalid or deadline has passed and is
   // notified on the thread Start() was invoked on.
   void Start(MojoHandle handle,
@@ skipping 19 matching lines @@
 
   // If non-NULL Start() has been invoked.
   scoped_ptr<StartState> start_state_;
 
   // Used for getting the time. Only set by tests.
   static base::TickClock* tick_clock_;
 
   DISALLOW_COPY_AND_ASSIGN(HandleWatcher);
 };
 
-}  // namespace shell
+}  // namespace common
 }  // namespace mojo
 
-#endif  // MOJO_SHELL_HANDLE_WATCHER_H_
+#endif  // MOJO_COMMON_HANDLE_WATCHER_H_