QGrpcHttp2Channel: update IWYU and favor fwd declarations

The header includes were not up-to-date.

Task-number: QTBUG-123625
Pick-to: 6.8
Change-Id: Id2a3d21925a0bf2ec6c8dfcb44617db3a8d5059c
Reviewed-by:  Alexey Edelev <alexey.edelev@qt.io>
Reviewed-by: Marc Mutz <marc.mutz@qt.io>

examples/grpc/chat/client/simplechatengine.cpp

@@ -5,6 +5,7 @@
 #include "simplechatengine.h"
 
 #include <QGrpcHttp2Channel>
+#include <QGrpcChannelOptions>
 
 #include <qprotobufregistration.h>
 

src/grpc/qgrpchttp2channel.cpp

@@ -3,10 +3,12 @@
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
 #include <QtGrpc/private/qtgrpcglobal_p.h>
+#include <QtGrpc/qgrpccalloptions.h>
+#include <QtGrpc/qgrpcchanneloptions.h>
 #include <QtGrpc/qgrpchttp2channel.h>
 #include <QtGrpc/qgrpcoperationcontext.h>
 #include <QtGrpc/qgrpcserializationformat.h>
-#include <QtGrpc/qtgrpcnamespace.h>
+#include <QtGrpc/qgrpcstatus.h>
 
 #include <QtProtobuf/qprotobufjsonserializer.h>
 #include <QtProtobuf/qprotobufserializer.h>
@@ -21,18 +23,18 @@
 #endif
 
 #include <QtCore/private/qnoncontiguousbytedevice_p.h>
-#include <QtCore/qbytearrayview.h>
+#include <QtCore/qalgorithms.h>
+#include <QtCore/qbytearray.h>
 #include <QtCore/qendian.h>
-#include <QtCore/qhash.h>
 #include <QtCore/qiodevice.h>
 #include <QtCore/qlist.h>
 #include <QtCore/qmetaobject.h>
+#include <QtCore/qpointer.h>
 #include <QtCore/qqueue.h>
 #include <QtCore/qtimer.h>
-#include <QtCore/qurl.h>
 
 #include <functional>
-#include <memory>
+#include <optional>
 #include <utility>
 
 QT_BEGIN_NAMESPACE

src/grpc/qgrpchttp2channel.h

@@ -6,12 +6,17 @@
 #define QGRPCHTTP2CHANNEL_H
 
 #include <QtGrpc/qabstractgrpcchannel.h>
-#include <QtGrpc/qgrpcchanneloptions.h>
+
+#include <QtCore/qtclasshelpermacros.h>
+#include <QtCore/qurl.h>
 
 #include <memory>
 
 QT_BEGIN_NAMESPACE
 
+class QAbstractProtobufSerializer;
+class QGrpcChannelOptions;
+class QGrpcOperationContext;
 
 class QGrpcHttp2ChannelPrivate;
 class Q_GRPC_EXPORT QGrpcHttp2Channel final : public QAbstractGrpcChannel

tests/auto/grpc/qgrpchttp2channel/tst_qgrpchttp2channel.cpp

@@ -4,6 +4,7 @@
 
 #include <QtGrpc/QGrpcHttp2Channel>
 #include <QtGrpc/QGrpcSerializationFormat>
+#include <QtGrpc/QGrpcChannelOptions>
 
 #include <QCoreApplication>
 #include <QSignalSpy>