mac: Remove IsOSSnowLeopard().

third_party/WebKit/Source/platform/scroll/Scrollbar.cpp

Index: third_party/WebKit/Source/platform/scroll/Scrollbar.cpp
diff --git a/third_party/WebKit/Source/platform/scroll/Scrollbar.cpp b/third_party/WebKit/Source/platform/scroll/Scrollbar.cpp
index 25516fd1809127c4504a402c2cc043782528a81b..eb2e4846a0e7a768aef7ce276443f7e79efc6912 100644
--- a/third_party/WebKit/Source/platform/scroll/Scrollbar.cpp
+++ b/third_party/WebKit/Source/platform/scroll/Scrollbar.cpp
@@ -31,11 +31,6 @@
 #include "platform/PlatformMouseEvent.h"
 #include "platform/geometry/FloatRect.h"
 #include "platform/graphics/paint/CullRect.h"
-// See windowActiveChangedForSnowLeopardOnly() below.
-// TODO(ellyjones): remove this when Snow Leopard support is gone.
-#if OS(MACOSX)
-#include "platform/mac/VersionUtilMac.h"
-#endif
 #include "platform/scroll/ScrollAnimatorBase.h"
 #include "platform/scroll/ScrollableArea.h"
 #include "platform/scroll/ScrollbarTheme.h"
@@ -535,21 +530,6 @@ bool Scrollbar::shouldParticipateInHitTesting()
     return m_scrollableArea->scrollAnimator().shouldScrollbarParticipateInHitTesting(*this);
 }
 
-// Don't use this method. It will be removed later.
-// TODO(ellyjones): remove this method after Snow Leopard support drops.
-void Scrollbar::windowActiveChangedForSnowLeopardOnly()
-{
-#if OS(MACOSX)
-    // On Snow Leopard, scrollbars need to be invalidated when the window
-    // activity changes so that they take on the "inactive" scrollbar
-    // appearance. Later OS X releases do not have such an appearance.
-    if (m_theme.invalidateOnWindowActiveChange()) {
-        ASSERT(IsOSSnowLeopard());
-        invalidate();
-    }
-#endif
-}
-
 bool Scrollbar::isWindowActive() const
 {
     return m_scrollableArea && m_scrollableArea->isActive();