Remove windows/mac/ios specific code from //ui

ui/gfx/animation/animation.cc

Index: ui/gfx/animation/animation.cc
diff --git a/ui/gfx/animation/animation.cc b/ui/gfx/animation/animation.cc
index fce72e8fce53f5104aa2e6e9513bea631f2164ce..46ca1e927daf3cbf2fc3cbf899a035dec2b051ae 100644
--- a/ui/gfx/animation/animation.cc
+++ b/ui/gfx/animation/animation.cc
@@ -9,10 +9,6 @@
 #include "ui/gfx/animation/tween.h"
 #include "ui/gfx/rect.h"
 
-#if defined(OS_WIN)
-#include "base/win/windows_version.h"
-#endif
-
 namespace gfx {
 
 Animation::Animation(base::TimeDelta timer_interval)
@@ -93,22 +89,7 @@ void Animation::SetContainer(AnimationContainer* container) {
 
 // static
 bool Animation::ShouldRenderRichAnimation() {
-#if defined(OS_WIN)
-  if (base::win::GetVersion() >= base::win::VERSION_VISTA) {
-    BOOL result;
-    // Get "Turn off all unnecessary animations" value.
-    if (::SystemParametersInfo(SPI_GETCLIENTAREAANIMATION, 0, &result, 0)) {
-      // There seems to be a typo in the MSDN document (as of May 2009):
-      //   http://msdn.microsoft.com/en-us/library/ms724947(VS.85).aspx
-      // The document states that the result is TRUE when animations are
-      // _disabled_, but in fact, it is TRUE when they are _enabled_.
-      return !!result;
-    }
-  }
-  return !::GetSystemMetrics(SM_REMOTESESSION);
-#else
   return true;
-#endif
 }
 
 bool Animation::ShouldSendCanceledFromStop() {