Remove some dead scrolling paths and unused params

Source/web/ChromeClientImpl.cpp

Index: Source/web/ChromeClientImpl.cpp
diff --git a/Source/web/ChromeClientImpl.cpp b/Source/web/ChromeClientImpl.cpp
index 7aae604a04a6ed9d7425fe1e69c8d118e122a7c6..85801d96a4acf0a1192a1c9bea5168631cea092f 100644
--- a/Source/web/ChromeClientImpl.cpp
+++ b/Source/web/ChromeClientImpl.cpp
@@ -493,19 +493,10 @@ void ChromeClientImpl::scheduleAnimation()
     m_webView->scheduleAnimation();
 }
 
-void ChromeClientImpl::scroll(
-    const IntSize& scrollDelta, const IntRect& scrollRect,
-    const IntRect& clipRect)
-{
-    if (!m_webView->isAcceleratedCompositingActive()) {
-        if (m_webView->client()) {
-            int dx = scrollDelta.width();
-            int dy = scrollDelta.height();
-            m_webView->client()->didScrollRect(dx, dy, intersection(scrollRect, clipRect));
-        }
-    } else {
-        m_webView->scrollRootLayer();
-    }
+void ChromeClientImpl::scroll()
+{
+    ASSERT(m_webView->isAcceleratedCompositingActive());
+    m_webView->scrollRootLayer();
 }
 
 IntRect ChromeClientImpl::rootViewToScreen(const IntRect& rect) const