Use ui/style/style_core_palette.

Telegram/SourceFiles/ui/chat/chat_style.h

@@ -8,6 +8,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #pragma once
 
 #include "ui/cached_round_corners.h"
+#include "ui/style/style_core_palette.h"
 
 namespace Ui {
 

Telegram/SourceFiles/ui/chat/chat_theme.cpp

@@ -10,6 +10,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/image/image_prepare.h"
 #include "ui/ui_utility.h"
 #include "ui/chat/message_bubble.h"
+#include "ui/style/style_core_palette.h"
 
 #include <crl/crl_async.h>
 #include <QtGui/QGuiApplication>
@@ -168,6 +169,8 @@ ChatTheme::ChatTheme(ChatThemeDescriptor &&descriptor)
 	setBackground(descriptor.prepareBackground());
 }
 
+ChatTheme::~ChatTheme() = default;
+
 void ChatTheme::setBackground(ChatThemeBackground &&background) {
 	_mutableBackground = std::move(background);
 	_backgroundState = {};

Telegram/SourceFiles/ui/chat/chat_theme.h

@@ -11,6 +11,10 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "base/timer.h"
 #include "base/weak_ptr.h"
 
+namespace style {
+class palette;
+} // namespace style
+
 namespace Ui {
 
 class ChatStyle;
@@ -112,6 +116,8 @@ public:
 	// Expected to be invoked on a background thread. Invokes callbacks there.
 	ChatTheme(ChatThemeDescriptor &&descriptor);
 
+	~ChatTheme();
+
 	[[nodiscard]] uint64 key() const;
 	[[nodiscard]] const style::palette *palette() const {
 		return _palette.get();

Telegram/SourceFiles/window/themes/window_theme.h

@@ -9,6 +9,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include "data/data_wall_paper.h"
 #include "data/data_cloud_themes.h"
+#include "ui/style/style_core_palette.h"
 
 namespace Main {
 class Session;