WebEngine MSVC build failures due to missing string headers

WebEngine bundled in 6.8.3 fails to build Using Visual Studio 2022 (compiler 14.42) due to a missing <string> header in the thirdparty gfx library.

Manifests these errors:

../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(27): error C2039: 'string': is not a member of 'std'
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.42.34433\include\optional(30): note: see declaration of 'std'
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(27): error C2065: 'string': undeclared identifier
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(27): error C2923: 'std::optional': 'string' is not a valid template type argument for parameter '_Ty'
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(27): note: see declaration of 'string'
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(29): error C2039: 'string': is not a member of 'std'
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.42.34433\include\optional(30): note: see declaration of 'std'
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(29): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(29): error C2143: syntax error: missing ',' before '&'
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(27): error C2955: 'std::optional': use of class template requires template argument list
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.42.34433\include\optional(213): note: see declaration of 'std::optional'
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(33): error C2039: 'string': is not a member of 'std'
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.42.34433\include\optional(30): note: see declaration of 'std'
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(33): error C2065: 'string': undeclared identifier
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(33): error C2923: 'std::optional': 'string' is not a valid template type argument for parameter '_Ty'
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(33): note: see declaration of 'string'
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(35): error C2039: 'string': is not a member of 'std'
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.42.34433\include\optional(30): note: see declaration of 'std'
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(35): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(35): error C2143: syntax error: missing ',' before '&'
../../../../../qt-everywhere-src-6.8.3/qtwebengine/src/3rdparty/chromium\ui/gfx/win/direct_write.h(33): error C2955: 'std::optional': use of class template requires template argument list
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.42.34433\include\optional(213): note: see declaration of 'std::optional'

Here is a patch:

 
— a/qtwebengine/src/3rdparty/chromium/ui/gfx/win/direct_write.h     2025-06-04 06:53:10.727511000 -0700
+++ b/qtwebengine/src/3rdparty/chromium/ui/gfx/win/direct_write.h     2025-06-04 06:53:49.200705600 -0700
@@ -6,6 +6,7 @@
 #define UI_GFX_WIN_DIRECT_WRITE_H_

 #include <dwrite.h>
+#include <string>

 #include "base/strings/string_piece.h"
 #include "third_party/abseil-cpp/absl/types/optional.h"