Hide location bar on Javascript-initiated scroll.

chrome/renderer/chrome_render_view_observer.cc

Index: chrome/renderer/chrome_render_view_observer.cc
diff --git a/chrome/renderer/chrome_render_view_observer.cc b/chrome/renderer/chrome_render_view_observer.cc
index 8903e4291d412813d43771d69a8319ba0c8aadd0..9e4a85a1119a43f176f14c2d711d67033a8ef97e 100644
--- a/chrome/renderer/chrome_render_view_observer.cc
+++ b/chrome/renderer/chrome_render_view_observer.cc
@@ -214,6 +214,10 @@ bool ChromeRenderViewObserver::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(ChromeViewMsg_AddStrictSecurityHost,
                         OnAddStrictSecurityHost)
     IPC_MESSAGE_HANDLER(ChromeViewMsg_NPAPINotSupported, OnNPAPINotSupported)
+#if defined(OS_ANDROID)
+    IPC_MESSAGE_HANDLER(ChromeViewMsg_UpdateTopControlsState,
+                        OnUpdateTopControlsState)
+#endif
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -281,6 +285,15 @@ void ChromeRenderViewObserver::OnNPAPINotSupported() {
 #endif
 }
 
+#if defined(OS_ANDROID)
+void ChromeRenderViewObserver::OnUpdateTopControlsState(
+    cc::TopControlsState constraints,
+    cc::TopControlsState current,
+    bool animate) {
+  render_view()->UpdateTopControlsState(constraints, current, animate);
+}
+#endif
+
 void ChromeRenderViewObserver::Navigate(const GURL& url) {
   // Execute cache clear operations that were postponed until a navigation
   // event (including tab reload).