[Mojo] Fix the namespace for HandleWrapper

mojo/apps/js/test/handle_unittest.cc

 // Copyright 2014 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 "base/macros.h"
 #include "mojo/bindings/js/handle.h"
 #include "mojo/bindings/js/handle_close_observer.h"
 #include "mojo/public/cpp/system/core.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace js {
 
 class HandleWrapperTest : public testing::Test,
-                          public gin::HandleCloseObserver {
+                          public HandleCloseObserver {
  public:
   HandleWrapperTest() : closes_observed_(0) {}
 
   virtual void OnWillCloseHandle() override { closes_observed_++; }
 
  protected:
   int closes_observed_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HandleWrapperTest);
 };
 
-class TestHandleWrapper : public gin::HandleWrapper {
+class TestHandleWrapper : public HandleWrapper {
  public:
   explicit TestHandleWrapper(MojoHandle handle) : HandleWrapper(handle) {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestHandleWrapper);
 };
 
 // Test that calling Close() on a HandleWrapper for an invalid handle does not
 // notify observers.
 TEST_F(HandleWrapperTest, CloseWithInvalidHandle) {
@@ skipping 42 matching lines @@
     mojo::MessagePipe pipe;
     TestHandleWrapper wrapper(pipe.handle0.release().value());
     wrapper.AddCloseObserver(this);
     ASSERT_EQ(0, closes_observed_);
   }
   EXPECT_EQ(1, closes_observed_);
 }
 
 }  // namespace js
 }  // namespace mojo