Remove TOOLKIT_USES_GTK

ui/gfx/image/image.h

Index: ui/gfx/image/image.h
diff --git a/ui/gfx/image/image.h b/ui/gfx/image/image.h
index 3c2c05d4b873743d62c87c4ee695d2156332cd0c..1878f49941c9ada5b7e3f930e6e165f575ddab57 100644
--- a/ui/gfx/image/image.h
+++ b/ui/gfx/image/image.h
@@ -38,7 +38,7 @@ class ImageMacTest;
 
 namespace gfx {
 
-#if defined(TOOLKIT_USES_GTK)
+#if defined(TOOLKIT_GTK)
 class CairoCachedSurface;
 #endif
 
@@ -73,7 +73,7 @@ class UI_EXPORT Image {
   // of bitmaps, one for each resolution.
   explicit Image(const std::vector<const SkBitmap*>& bitmaps);
 
-#if defined(TOOLKIT_USES_GTK)
+#if defined(TOOLKIT_GTK)
   // Does not increase |pixbuf|'s reference count; expects to take ownership.
   explicit Image(GdkPixbuf* pixbuf);
 #elif defined(OS_MACOSX)
@@ -97,7 +97,7 @@ class UI_EXPORT Image {
   // The returned result is a weak pointer owned by and scoped to the life of
   // the Image.
   const SkBitmap* ToSkBitmap() const;
-#if defined(TOOLKIT_USES_GTK)
+#if defined(TOOLKIT_GTK)
   GdkPixbuf* ToGdkPixbuf() const;
   CairoCachedSurface* const ToCairo() const;
 #elif defined(OS_MACOSX)
@@ -111,7 +111,7 @@ class UI_EXPORT Image {
   // converted representations, rather than a limitation imposed by Image) and
   // so the result should be considered immutable.
   SkBitmap* CopySkBitmap() const;
-#if defined(TOOLKIT_USES_GTK)
+#if defined(TOOLKIT_GTK)
   GdkPixbuf* CopyGdkPixbuf() const;
 #elif defined(OS_MACOSX)
   NSImage* CopyNSImage() const;