Remove implicit HANDLE conversions from ui.

ui/native_theme/native_theme_win.cc

Index: ui/native_theme/native_theme_win.cc
diff --git a/ui/native_theme/native_theme_win.cc b/ui/native_theme/native_theme_win.cc
index 474bcab22f8bc483dc36f0e40ff9dac763f2ff07..5123ccae179e89b7ecc24c9e426c472966a28685 100644
--- a/ui/native_theme/native_theme_win.cc
+++ b/ui/native_theme/native_theme_win.cc
@@ -874,18 +874,18 @@ HRESULT NativeThemeWin::PaintMenuArrow(
     base::win::ScopedCreateDC mem_dc(CreateCompatibleDC(hdc));
     base::win::ScopedBitmap mem_bitmap(CreateCompatibleBitmap(hdc, r.width(),
                                                               r.height()));
-    base::win::ScopedSelectObject select_bitmap(mem_dc, mem_bitmap);
+    base::win::ScopedSelectObject select_bitmap(mem_dc.Get(), mem_bitmap);
     // Copy and horizontally mirror the background from hdc into mem_dc. Use
     // a negative-width source rect, starting at the rightmost pixel.
-    StretchBlt(mem_dc, 0, 0, r.width(), r.height(),
-                hdc, r.right()-1, r.y(), -r.width(), r.height(), SRCCOPY);
+    StretchBlt(mem_dc.Get(), 0, 0, r.width(), r.height(),
+               hdc, r.right()-1, r.y(), -r.width(), r.height(), SRCCOPY);
     // Draw the arrow.
     RECT theme_rect = {0, 0, r.width(), r.height()};
-    HRESULT result = draw_theme_(handle, mem_dc, MENU_POPUPSUBMENU,
+    HRESULT result = draw_theme_(handle, mem_dc.Get(), MENU_POPUPSUBMENU,
                                   state_id, &theme_rect, NULL);
     // Copy and mirror the result back into mem_dc.
     StretchBlt(hdc, r.x(), r.y(), r.width(), r.height(),
-                mem_dc, r.width()-1, 0, -r.width(), r.height(), SRCCOPY);
+               mem_dc.Get(), r.width()-1, 0, -r.width(), r.height(), SRCCOPY);
     return result;
   }
 
@@ -1976,9 +1976,9 @@ HRESULT NativeThemeWin::PaintFrameControl(HDC hdc,
     return E_OUTOFMEMORY;
 
   base::win::ScopedCreateDC bitmap_dc(CreateCompatibleDC(NULL));
-  base::win::ScopedSelectObject select_bitmap(bitmap_dc, mask_bitmap);
+  base::win::ScopedSelectObject select_bitmap(bitmap_dc.Get(), mask_bitmap);
   RECT local_rect = { 0, 0, width, height };
-  DrawFrameControl(bitmap_dc, &local_rect, type, state);
+  DrawFrameControl(bitmap_dc.Get(), &local_rect, type, state);
 
   // We're going to use BitBlt with a b&w mask. This results in using the dest
   // dc's text color for the black bits in the mask, and the dest dc's
@@ -2004,7 +2004,8 @@ HRESULT NativeThemeWin::PaintFrameControl(HDC hdc,
   }
   COLORREF old_bg_color = SetBkColor(hdc, GetSysColor(bg_color_key));
   COLORREF old_text_color = SetTextColor(hdc, GetSysColor(text_color_key));
-  BitBlt(hdc, rect.x(), rect.y(), width, height, bitmap_dc, 0, 0, SRCCOPY);
+  BitBlt(hdc, rect.x(), rect.y(), width, height, bitmap_dc.Get(), 0, 0,
+         SRCCOPY);
   SetBkColor(hdc, old_bg_color);
   SetTextColor(hdc, old_text_color);