Hide location bar on WebKit programmatic scroll.

cc/thread_proxy.cc

Index: cc/thread_proxy.cc
diff --git a/cc/thread_proxy.cc b/cc/thread_proxy.cc
index dde1b870c43c810667e58874225d380aa2bcb11d..f509943bbf8f1e74e73f0f804ba5aeab0301afa6 100644
--- a/cc/thread_proxy.cc
+++ b/cc/thread_proxy.cc
@@ -138,6 +138,19 @@ void ThreadProxy::requestStartPageScaleAnimationOnImplThread(gfx::Vector2d targe
         m_layerTreeHostImpl->startPageScaleAnimation(targetOffset, useAnchor, scale, base::TimeTicks::Now(), duration);
 }
 
+void ThreadProxy::programmaticScroll(gfx::Vector2d targetOffset)
+{
+    DCHECK(Proxy::isMainThread());
+    Proxy::implThread()->postTask(base::Bind(&ThreadProxy::requestProgrammaticScroll, m_implThreadWeakPtr, targetOffset));
+}
+
+void ThreadProxy::requestProgrammaticScroll(gfx::Vector2d targetOffset)
+{
+    DCHECK(Proxy::isImplThread());
+    if (m_layerTreeHostImpl.get())
+        m_layerTreeHostImpl->programmaticScroll(targetOffset);
+}
+
 void ThreadProxy::finishAllRendering()
 {
     DCHECK(Proxy::isMainThread());