[Sync] Convert sync to a static library.

components/sync/base/weak_handle.h

 // Copyright 2012 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.
 
 // Weak handles provides a way to refer to weak pointers from another
 // thread.  This is useful because it is not safe to reference a weak
 // pointer from a thread other than the thread on which it was
 // created.
 //
 // Weak handles can be passed across threads, so for example, you can
@@ skipping 41 matching lines @@
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
-#include "components/sync/base/sync_export.h"
 
 namespace tracked_objects {
 class Location;
 }  // namespace tracked_objects
 
 namespace syncer {
 
 template <typename T>
 class WeakHandle;
 
 namespace internal {
 // These classes are part of the WeakHandle implementation.  DO NOT
 // USE THESE CLASSES DIRECTLY YOURSELF.
 
 // Base class for WeakHandleCore<T> to avoid template bloat.  Handles
 // the interaction with the owner thread and its message loop.
-class SYNC_EXPORT WeakHandleCoreBase {
+class WeakHandleCoreBase {
  public:
   // Assumes the current thread is the owner thread.
   WeakHandleCoreBase();
 
   // May be called on any thread.
   bool IsOnOwnerThread() const;
 
  protected:
   // May be destroyed on any thread.
   ~WeakHandleCoreBase();
@@ skipping 105 matching lines @@
 
 // Makes a WeakHandle from a WeakPtr.
 template <typename T>
 WeakHandle<T> MakeWeakHandle(const base::WeakPtr<T>& ptr) {
   return WeakHandle<T>(ptr);
 }
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_BASE_WEAK_HANDLE_H_