Remove skia::SupportsPlatformPaint()

ui/native_theme/native_theme_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/native_theme/native_theme_win.h"
 
 #include <windows.h>
 #include <stddef.h>
 #include <uxtheme.h>
 #include <vsstyle.h>
@@ skipping 267 matching lines @@
       break;
   }
 
   HDC surface = skia::GetNativeDrawingContext(canvas);
 
   // When drawing the task manager or the bookmark editor, we draw into an
   // offscreen buffer, where we can use OS-specific drawing routines for
   // UI features like scrollbars. However, we need to set up that buffer,
   // and then read it back when it's done and blit it onto the screen.
 
-  if (skia::SupportsPlatformPaint(canvas))
+  if (surface)
     PaintDirect(canvas, surface, part, state, rect, extra);
   else
-    PaintIndirect(canvas, surface, part, state, rect, extra);
+    PaintIndirect(canvas, part, state, rect, extra);
 }
 
 NativeThemeWin::NativeThemeWin()
     : draw_theme_(NULL),
       draw_theme_ex_(NULL),
       get_theme_color_(NULL),
       get_theme_content_rect_(NULL),
       get_theme_part_size_(NULL),
       open_theme_(NULL),
       close_theme_(NULL),
@@ skipping 364 matching lines @@
         return kProminentButtonColorInvert;
       default:
         return color_utils::InvertColor(GetAuraColor(color_id, this));
     }
   }
 
   return GetAuraColor(color_id, this);
 }
 
 void NativeThemeWin::PaintIndirect(SkCanvas* destination_canvas,
-                                   HDC destination_hdc,
                                    Part part,
                                    State state,
                                    const gfx::Rect& rect,
                                    const ExtraParams& extra) const {
   // TODO(asvitkine): This path is pretty inefficient - for each paint operation
   //                  it creates a new offscreen bitmap Skia canvas. This can
   //                  be sped up by doing it only once per part/state and
   //                  keeping a cache of the resulting bitmaps.
 
   // If this process doesn't have access to GDI, we'd need to use shared memory
@@ skipping 1417 matching lines @@
     break;
   case LAST:
     NOTREACHED();
     break;
   }
   theme_handles_[theme_name] = handle;
   return handle;
 }
 
 }  // namespace ui