Allows fullscreen to be triggered with the key events used for scrolling.

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"
@@ skipping 18 matching lines @@
   //                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);
+    top_controls_constraints_ = constraints;
   }
 }
 
 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(constraints_cc, current_cc, animate);
+  top_controls_constraints_ = constraints_cc;
+}
+
+void RenderViewImpl::didScrollWithKeyboard(const WebKit::WebSize& delta) {
+  if (delta.height == 0)
+    return;
+  if (compositor_) {
+    cc::TopControlsState current = delta.height < 0 ? cc::SHOWN : cc::HIDDEN;
+    compositor_->UpdateTopControlsState(top_controls_constraints_,
+                                        current,
+                                        true);
+  }
 }
 
 }  // namespace content