Convert //extensions/renderer from scoped_ptr to std::unique_ptr

extensions/renderer/mojo/stash_client_unittest.cc

Index: extensions/renderer/mojo/stash_client_unittest.cc
diff --git a/extensions/renderer/mojo/stash_client_unittest.cc b/extensions/renderer/mojo/stash_client_unittest.cc
index 3f361cc253582fa76a47d6304bf5113c0dff6702..a672c977e44fe92edd630a4fc6cb5bc6891c86e6 100644
--- a/extensions/renderer/mojo/stash_client_unittest.cc
+++ b/extensions/renderer/mojo/stash_client_unittest.cc
@@ -31,7 +31,7 @@ class StashClientTest : public ApiTestBase {
         &StashBackend::BindToRequest, base::Unretained(stash_backend_.get())));
   }
 
-  scoped_ptr<StashBackend> stash_backend_;
+  std::unique_ptr<StashBackend> stash_backend_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(StashClientTest);
@@ -46,7 +46,8 @@ class StashClientTest : public ApiTestBase {
 // Test that stashing and restoring work correctly.
 TEST_F(StashClientTest, MAYBE_StashAndRestore) {
   ASSERT_NO_FATAL_FAILURE(RunTest("stash_client_unittest.js", "testStash"));
-  scoped_ptr<ModuleSystemTestEnvironment> restore_test_env(CreateEnvironment());
+  std::unique_ptr<ModuleSystemTestEnvironment> restore_test_env(
+      CreateEnvironment());
   ApiTestEnvironment restore_environment(restore_test_env.get());
   PrepareEnvironment(&restore_environment);
   restore_environment.RunTest("stash_client_unittest.js", "testRetrieve");