Chromium side of trackbar drawing. This is needed to support <input type="ra...

base/gfx/native_theme.h

Index: base/gfx/native_theme.h
===================================================================
--- base/gfx/native_theme.h	(revision 12164)
+++ base/gfx/native_theme.h	(working copy)
@@ -41,6 +41,7 @@
     STATUS,
     TAB,
     TEXTFIELD,
+    TRACKBAR,
     WINDOW,
     LAST
   };
@@ -199,6 +200,13 @@
                          bool fill_content_area,
                          bool draw_edges) const;
 
+  HRESULT PaintTrackbar(HDC hdc,
+                        int part_id,
+                        int state_id,
+                        int classic_state,
+                        RECT* rect,
+                        skia::PlatformCanvasWin* canvas) const;
+
   bool IsThemingActive() const;
 
   HRESULT GetThemePartSize(ThemeName themeName,