[Mojo] Fix the namespace for HandleWrapper

mojo/apps/js/test/handle_unittest.cc

Index: mojo/apps/js/test/handle_unittest.cc
diff --git a/mojo/apps/js/test/handle_unittest.cc b/mojo/apps/js/test/handle_unittest.cc
index ec089c91ba318cfe4d131c9b54e345a2ae20b5fd..9167197c18a26bfc7e2b3b9487078f8da15de06f 100644
--- a/mojo/apps/js/test/handle_unittest.cc
+++ b/mojo/apps/js/test/handle_unittest.cc
@@ -12,7 +12,7 @@ namespace mojo {
 namespace js {
 
 class HandleWrapperTest : public testing::Test,
-                          public gin::HandleCloseObserver {
+                          public HandleCloseObserver {
  public:
   HandleWrapperTest() : closes_observed_(0) {}
 
@@ -25,7 +25,7 @@ class HandleWrapperTest : public testing::Test,
   DISALLOW_COPY_AND_ASSIGN(HandleWrapperTest);
 };
 
-class TestHandleWrapper : public gin::HandleWrapper {
+class TestHandleWrapper : public HandleWrapper {
  public:
   explicit TestHandleWrapper(MojoHandle handle) : HandleWrapper(handle) {}