Rename 'UseCounter::observe' to 'UseCounter::count'.

Source/core/rendering/RenderLayer.cpp

Index: Source/core/rendering/RenderLayer.cpp
diff --git a/Source/core/rendering/RenderLayer.cpp b/Source/core/rendering/RenderLayer.cpp
index 9ce524d8cf3878fc427e79aa477f8fd598c5a7ce..3f9f2f287e281a6d513be290fd6d1b47c53e3f07 100644
--- a/Source/core/rendering/RenderLayer.cpp
+++ b/Source/core/rendering/RenderLayer.cpp
@@ -6240,7 +6240,7 @@ void RenderLayer::styleChanged(StyleDifference, const RenderStyle* oldStyle)
     if (renderer()->style()->overflowX() == OMARQUEE && renderer()->style()->marqueeBehavior() != MNONE && renderer()->isBox()) {
         if (!m_marquee)
             m_marquee = adoptPtr(new RenderMarquee(this));
-        UseCounter::observe(renderer()->document(), renderer()->isHTMLMarquee() ? UseCounter::HTMLMarqueeElement : UseCounter::CSSOverflowMarquee);
+        UseCounter::count(renderer()->document(), renderer()->isHTMLMarquee() ? UseCounter::HTMLMarqueeElement : UseCounter::CSSOverflowMarquee);
         m_marquee->updateMarqueeStyle();
     }
     else if (m_marquee) {
@@ -6260,7 +6260,7 @@ void RenderLayer::styleChanged(StyleDifference, const RenderStyle* oldStyle)
     else if (hasReflection()) {
         if (!m_reflection)
             createReflection();
-        UseCounter::observe(renderer()->document(), UseCounter::Reflection);
+        UseCounter::count(renderer()->document(), UseCounter::Reflection);
         updateReflectionStyle();
     }