Convert //extensions/browser/api from scoped_ptr to std::unique_ptr

extensions/browser/api/cast_channel/cast_test_util.h

Index: extensions/browser/api/cast_channel/cast_test_util.h
diff --git a/extensions/browser/api/cast_channel/cast_test_util.h b/extensions/browser/api/cast_channel/cast_test_util.h
index 550a460a66a3b1f9df4854407732e44fb22c9eaf..0c8d75551e0be69a2b8c9c7f07330f116db63210 100644
--- a/extensions/browser/api/cast_channel/cast_test_util.h
+++ b/extensions/browser/api/cast_channel/cast_test_util.h
@@ -27,7 +27,8 @@ class MockCastTransport : public extensions::api::cast_channel::CastTransport {
   MockCastTransport();
   ~MockCastTransport() override;
 
-  void SetReadDelegate(scoped_ptr<CastTransport::Delegate> delegate) override;
+  void SetReadDelegate(
+      std::unique_ptr<CastTransport::Delegate> delegate) override;
 
   MOCK_METHOD2(SendMessage,
                void(const extensions::api::cast_channel::CastMessage& message,
@@ -39,7 +40,7 @@ class MockCastTransport : public extensions::api::cast_channel::CastTransport {
   CastTransport::Delegate* current_delegate() const;
 
  private:
-  scoped_ptr<CastTransport::Delegate> delegate_;
+  std::unique_ptr<CastTransport::Delegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(MockCastTransport);
 };
@@ -70,7 +71,7 @@ class MockCastSocket : public CastSocket {
 
   // Proxy for ConnectRawPtr. Unpacks scoped_ptr into a GMock-friendly bare
   // ptr.
-  void Connect(scoped_ptr<CastTransport::Delegate> delegate,
+  void Connect(std::unique_ptr<CastTransport::Delegate> delegate,
                base::Callback<void(ChannelError)> callback) override {
     delegate_ = std::move(delegate);
     ConnectRawPtr(delegate_.get(), callback);
@@ -92,8 +93,8 @@ class MockCastSocket : public CastSocket {
   MockCastTransport* mock_transport() const { return mock_transport_.get(); }
 
  private:
-  scoped_ptr<MockCastTransport> mock_transport_;
-  scoped_ptr<CastTransport::Delegate> delegate_;
+  std::unique_ptr<MockCastTransport> mock_transport_;
+  std::unique_ptr<CastTransport::Delegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(MockCastSocket);
 };