Hide location bar on Javascript-initiated scroll.

content/renderer/render_view_impl_android.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_view_impl.h"
 
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "cc/trees/layer_tree_host.h"
 #include "content/renderer/gpu/render_widget_compositor.h"
 
 namespace content {
 
+// Check content::TopControlsState and cc::TopControlsState are kept in sync.
+COMPILE_ASSERT(int(SHOWN) == int(cc::SHOWN), mismatching_enums);
+COMPILE_ASSERT(int(HIDDEN) == int(cc::HIDDEN), mismatching_enums);
+COMPILE_ASSERT(int(BOTH) == int(cc::BOTH), mismatching_enums);
+
+cc::TopControlsState ContentToCcTopControlsState(
+    TopControlsState state) {
+  return static_cast<cc::TopControlsState>(state);
+}
+
+// TODO(mvanouwerkerk): Stop calling this code path and delete it.
 void RenderViewImpl::OnUpdateTopControlsState(bool enable_hiding,
                                               bool enable_showing,
                                               bool animate) {
   // TODO(tedchoc): Investigate why messages are getting here before the
   //                compositor has been initialized.
   LOG_IF(WARNING, !compositor_) << "OnUpdateTopControlsState was unhandled.";
+  if (compositor_) {
+    cc::TopControlsState constraints = cc::BOTH;
+    if (!enable_showing)
+      constraints = cc::HIDDEN;
+    if (!enable_hiding)
+      constraints = cc::SHOWN;
+    cc::TopControlsState current = cc::BOTH;
+    compositor_->UpdateTopControlsState(constraints, current, animate);
+  }
+}
+
+void RenderViewImpl::UpdateTopControlsState(TopControlsState constraints,
+                                            TopControlsState current,
+                                            bool animate) {
+  cc::TopControlsState constraints_cc =
+      ContentToCcTopControlsState(constraints);
+  cc::TopControlsState current_cc = ContentToCcTopControlsState(current);
   if (compositor_)
-    compositor_->UpdateTopControlsState(enable_hiding, enable_showing, animate);
+    compositor_->UpdateTopControlsState(constraints_cc, current_cc, animate);
 }
 
 }  // namespace content