[Win] Statically link in uxtheme for Windows Native Theme.

This CL removes the dynamic linking of Vista-era APIs in preference to
static linking. To prevent the uxtheme DLL being loaded unnecessarily the
DLL is added marked as delay loaded.

Bug: 986625
Change-Id: I29987f493b7fdf92633b3ba4dde61573b5543bc1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1720905Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: James Forshaw <forshaw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683176}

chrome/BUILD.gn

@@ -466,6 +466,7 @@ if (is_win) {
       "/DELAYLOAD:user32.dll",
       "/DELAYLOAD:userenv.dll",
       "/DELAYLOAD:usp10.dll",
+      "/DELAYLOAD:uxtheme.dll",
       "/DELAYLOAD:wer.dll",
       "/DELAYLOAD:wevtapi.dll",
       "/DELAYLOAD:winhttp.dll",

ui/native_theme/BUILD.gn

@@ -83,6 +83,8 @@ if (is_win) {
       "//ui/display",
       "//ui/gfx",
     ]
+
+    libs = [ "uxtheme.lib" ]
   }
 } else {
   jumbo_source_set("native_theme_browser") {

ui/native_theme/native_theme_win.h

@@ -14,7 +14,6 @@
 #include <map>
 
 #include <windows.h>
-#include <uxtheme.h>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
@@ -135,14 +134,6 @@ class NATIVE_THEME_EXPORT NativeThemeWin : public NativeTheme,
                      const gfx::Rect& rect,
                      const ExtraParams& extra) const;
 
-  HRESULT GetThemePartSize(ThemeName themeName,
-                           HDC hdc,
-                           int part_id,
-                           int state_id,
-                           RECT* rect,
-                           int ts,
-                           SIZE* size) const;
-
   HRESULT PaintButton(HDC hdc,
                       State state,
                       const ButtonExtraParams& extra,
@@ -274,60 +265,6 @@ class NATIVE_THEME_EXPORT NativeThemeWin : public NativeTheme,
   void RegisterThemeRegkeyObserver();
   void UpdateDarkModeStatus();
 
-  typedef HRESULT (WINAPI* DrawThemeBackgroundPtr)(HANDLE theme,
-                                                   HDC hdc,
-                                                   int part_id,
-                                                   int state_id,
-                                                   const RECT* rect,
-                                                   const RECT* clip_rect);
-  typedef HRESULT (WINAPI* DrawThemeBackgroundExPtr)(HANDLE theme,
-                                                     HDC hdc,
-                                                     int part_id,
-                                                     int state_id,
-                                                     const RECT* rect,
-                                                     const DTBGOPTS* opts);
-  typedef HRESULT (WINAPI* GetThemeColorPtr)(HANDLE hTheme,
-                                             int part_id,
-                                             int state_id,
-                                             int prop_id,
-                                             COLORREF* color);
-  typedef HRESULT (WINAPI* GetThemeContentRectPtr)(HANDLE hTheme,
-                                                   HDC hdc,
-                                                   int part_id,
-                                                   int state_id,
-                                                   const RECT* rect,
-                                                   RECT* content_rect);
-  typedef HRESULT (WINAPI* GetThemePartSizePtr)(HANDLE hTheme,
-                                                HDC hdc,
-                                                int part_id,
-                                                int state_id,
-                                                RECT* rect,
-                                                int ts,
-                                                SIZE* size);
-  typedef HANDLE (WINAPI* OpenThemeDataPtr)(HWND window,
-                                            LPCWSTR class_list);
-  typedef HRESULT (WINAPI* CloseThemeDataPtr)(HANDLE theme);
-
-  typedef void (WINAPI* SetThemeAppPropertiesPtr) (DWORD flags);
-  typedef BOOL (WINAPI* IsThemeActivePtr)();
-  typedef HRESULT (WINAPI* GetThemeIntPtr)(HANDLE hTheme,
-                                           int part_id,
-                                           int state_id,
-                                           int prop_id,
-                                           int *value);
-
-  // Function pointers into uxtheme.dll.
-  DrawThemeBackgroundPtr draw_theme_;
-  DrawThemeBackgroundExPtr draw_theme_ex_;
-  GetThemeColorPtr get_theme_color_;
-  GetThemeContentRectPtr get_theme_content_rect_;
-  GetThemePartSizePtr get_theme_part_size_;
-  OpenThemeDataPtr open_theme_;
-  CloseThemeDataPtr close_theme_;
-
-  // Handle to uxtheme.dll.
-  HMODULE theme_dll_;
-
   // Dark Mode registry key.
   base::win::RegKey hkcu_themes_regkey_;