Update Panel UI looks on Windows.

chrome/browser/ui/panels/panel_browser_frame_view.h

Index: chrome/browser/ui/panels/panel_browser_frame_view.h
diff --git a/chrome/browser/ui/panels/panel_browser_frame_view.h b/chrome/browser/ui/panels/panel_browser_frame_view.h
index ea085e1e9c976aae6491ea2d1df29e375808f2e8..5e42e3884b040cf41c0fb8720ff199e10aa22c82 100644
--- a/chrome/browser/ui/panels/panel_browser_frame_view.h
+++ b/chrome/browser/ui/panels/panel_browser_frame_view.h
@@ -18,6 +18,7 @@
 class Extension;
 class PanelBrowserView;
 class PanelSettingsMenuModel;
+class SkPaint;
 namespace gfx {
 class Font;
 }
@@ -141,14 +142,15 @@ class PanelBrowserFrameView : public BrowserNonClientFrameView,
 
   // Custom draw the frame.
   void PaintFrameBorder(gfx::Canvas* canvas);
-  void PaintClientEdge(gfx::Canvas* canvas);
 
   // Called by MouseWatcher to notify if the mouse enters or leaves the window.
   void OnMouseEnterOrLeaveWindow(bool mouse_entered);
 
   // Retrieves the drawing metrics based on the current painting state.
+  SkColor GetDefaultTitleColor(PaintState paint_state) const;
   SkColor GetTitleColor(PaintState paint_state) const;
   gfx::Font* GetTitleFont() const;
+  SkPaint* GetDefaultFrameTheme(PaintState paint_state) const;
   SkBitmap* GetFrameTheme(PaintState paint_state) const;
 
   // Make settings button visible if either of the conditions is met:
@@ -156,6 +158,8 @@ class PanelBrowserFrameView : public BrowserNonClientFrameView,
   // 2) The mouse is over the panel.
   void UpdateSettingsButtonVisibility(bool active, bool cursor_in_view);
 
+  bool UsingDefaultTheme() const;
+
   const Extension* GetExtension() const;
 
   bool EnsureSettingsMenuCreated();