Make the RenderViewHostImpl update its visibility after a swap.

content/browser/renderer_host/render_widget_host_view_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/browser/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 181 matching lines @@
     RenderWidgetHostView* reference_host_view) {
   NOTIMPLEMENTED();
 }
 
 RenderWidgetHost*
 RenderWidgetHostViewAndroid::GetRenderWidgetHost() const {
   return host_;
 }
 
 void RenderWidgetHostViewAndroid::WasShown() {
-  if (!host_->is_hidden())
+  if (!host_ || !host_->is_hidden())

[piman, 2013/09/20 16:51:30]

host_ is only reset right before |this| is destroyed. Is this really called in
the destructor?

     return;
 
   host_->WasShown();
 }
 
 void RenderWidgetHostViewAndroid::WasHidden() {
   RunAckCallbacks();
 
-  if (host_->is_hidden())
+  if (!host_ || host_->is_hidden())
     return;
 
   // Inform the renderer that we are being hidden so it can reduce its resource
   // utilization.
   host_->WasHidden();
 }
 
 void RenderWidgetHostViewAndroid::WasResized() {
   if (surface_texture_transport_.get() && content_view_core_)
     surface_texture_transport_->SetSize(
@@ skipping 127 matching lines @@
 bool RenderWidgetHostViewAndroid::IsSurfaceAvailableForCopy() const {
   return HasValidFrame();
 }
 
 void RenderWidgetHostViewAndroid::Show() {
   if (are_layers_attached_)
     return;
 
   are_layers_attached_ = true;
   AttachLayers();
+
+  WasShown();
 }
 
 void RenderWidgetHostViewAndroid::Hide() {
   if (!are_layers_attached_)
     return;
 
   are_layers_attached_ = false;
   RemoveLayers();
+
+  WasHidden();
 }
 
 bool RenderWidgetHostViewAndroid::IsShowing() {
   // ContentViewCoreImpl represents the native side of the Java
   // ContentViewCore.  It being NULL means that it is not attached
   // to the View system yet, so we treat this RWHVA as hidden.
   return are_layers_attached_ && content_view_core_;
 }
 
 gfx::Rect RenderWidgetHostViewAndroid::GetViewBounds() const {
@@ skipping 930 matching lines @@
 // RenderWidgetHostView, public:
 
 // static
 RenderWidgetHostView*
 RenderWidgetHostView::CreateViewForWidget(RenderWidgetHost* widget) {
   RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(widget);
   return new RenderWidgetHostViewAndroid(rwhi, NULL);
 }
 
 } // namespace content