Make the RenderViewHostImpl update its visibility after a swap.

content/browser/renderer_host/render_widget_host_view_android.cc

Index: content/browser/renderer_host/render_widget_host_view_android.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_android.cc b/content/browser/renderer_host/render_widget_host_view_android.cc
index ae2806e715333df1cd7df7ec65186a8de7357c39..d4150f7674ef3df12c48060020c8510b1e518312 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.cc
+++ b/content/browser/renderer_host/render_widget_host_view_android.cc
@@ -199,6 +199,7 @@ RenderWidgetHostViewAndroid::GetRenderWidgetHost() const {
 }
 
 void RenderWidgetHostViewAndroid::WasShown() {
+  DCHECK(host_);
   if (!host_->is_hidden())
     return;
 
@@ -208,6 +209,7 @@ void RenderWidgetHostViewAndroid::WasShown() {
 void RenderWidgetHostViewAndroid::WasHidden() {
   RunAckCallbacks();
 
+  DCHECK(host_);
   if (host_->is_hidden())
     return;
 
@@ -356,6 +358,8 @@ void RenderWidgetHostViewAndroid::Show() {
 
   are_layers_attached_ = true;
   AttachLayers();
+
+  WasShown();
 }
 
 void RenderWidgetHostViewAndroid::Hide() {
@@ -364,6 +368,8 @@ void RenderWidgetHostViewAndroid::Hide() {
 
   are_layers_attached_ = false;
   RemoveLayers();
+
+  WasHidden();
 }
 
 bool RenderWidgetHostViewAndroid::IsShowing() {