[Sync] Remove unneeded 'using syncer::' lines and 'syncer::' scopings

sync/internal_api/public/test/test_user_share.h

 // Copyright (c) 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.
 //
 // A handy class that takes care of setting up and destroying a
-// syncer::UserShare instance for unit tests that require one.
+// UserShare instance for unit tests that require one.
 //
 // The expected usage is to make this a component of your test fixture:
 //
 //   class AwesomenessTest : public testing::Test {
 //    public:
 //     virtual void SetUp() {
 //       test_user_share_.SetUp();
 //     }
 //     virtual void TearDown() {
 //       test_user_share_.TearDown();
 //     }
 //    protected:
 //     TestUserShare test_user_share_;
 //   };
 //
 // Then, in your tests:
 //
 //   TEST_F(AwesomenessTest, IsMaximal) {
-//     syncer::ReadTransaction trans(test_user_share_.user_share());
+//     ReadTransaction trans(test_user_share_.user_share());
 //     ...
 //   }
 //
 
 #ifndef SYNC_INTERNAL_API_PUBLIC_TEST_TEST_USER_SHARE_H_
 #define SYNC_INTERNAL_API_PUBLIC_TEST_TEST_USER_SHARE_H_
 
 #include "base/basictypes.h"
 #include "sync/internal_api/public/user_share.h"
 
@@ skipping 10 matching lines @@
   // backing files that might exist on disk.
   void SetUp();
 
   // Undo everything done by SetUp(): closes the UserShare and deletes
   // the backing files. Before closing the directory, this will run
   // the directory invariant checks and perform the SaveChanges action
   // on the user share's directory.
   void TearDown();
 
   // Non-NULL iff called between a call to SetUp() and TearDown().
-  syncer::UserShare* user_share();
+  UserShare* user_share();
 
  private:
   scoped_ptr<TestDirectorySetterUpper> dir_maker_;
-  scoped_ptr<syncer::UserShare> user_share_;
+  scoped_ptr<UserShare> user_share_;
 
   DISALLOW_COPY_AND_ASSIGN(TestUserShare);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_TEST_TEST_USER_SHARE_H_