Remove unused blink::WebCursorInfo::external_handle

Bug: 1028080
Change-Id: I15606b5c28ba03e4229b805af9f61c9bacfb7fd1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1947649Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Henrique Ferreiro <hferreiro@igalia.com>
Cr-Commit-Position: refs/heads/master@{#720930}

third_party/blink/public/platform/web_cursor_info.h

@@ -50,19 +50,8 @@ struct WebCursorInfo {
   float image_scale_factor;
   SkBitmap custom_image;
 
-#ifdef WIN32
-  // On Windows, kTypeCustom may alternatively reference an externally
-  // defined HCURSOR. If |type| is kTypeCustom and |external_handle| is non-
-  // null, then |custom_image| should be ignored. The WebCursorInfo is not
-  // responsible for managing the lifetime of this cursor handle.
-  HCURSOR external_handle;
-#endif
-
   explicit WebCursorInfo(ui::CursorType type = ui::CursorType::kPointer)
       : type(type), image_scale_factor(1) {
-#ifdef WIN32
-    external_handle = 0;
-#endif
   }
 
 #if INSIDE_BLINK

third_party/blink/renderer/platform/exported/web_cursor_info.cc

@@ -45,12 +45,6 @@ WebCursorInfo::WebCursorInfo(const Cursor& cursor)
     : type(static_cast<ui::CursorType>(cursor.GetType())),
       hot_spot(cursor.HotSpot()),
       image_scale_factor(cursor.ImageScaleFactor()),
-      custom_image(GetCursorBitmap(cursor))
-#ifdef WIN32
-      ,
-      external_handle(0)
-#endif
-{
-}
+      custom_image(GetCursorBitmap(cursor)) {}
 
 }  // namespace blink