Revert of Add ref-count on RenderViewHost for each new RenderFrameProxyHost.

content/browser/frame_host/render_frame_host_manager.cc

Index: content/browser/frame_host/render_frame_host_manager.cc
diff --git a/content/browser/frame_host/render_frame_host_manager.cc b/content/browser/frame_host/render_frame_host_manager.cc
index cd0b79a843f52b153845c4a546d741c158a06d97..4588e078817987e52eacf623bf3c61fc82ef3238 100644
--- a/content/browser/frame_host/render_frame_host_manager.cc
+++ b/content/browser/frame_host/render_frame_host_manager.cc
@@ -598,9 +598,7 @@
   // (There should not be one yet.)
   CHECK(!GetRenderFrameProxyHost(old_render_frame_host->GetSiteInstance()));
   RenderFrameProxyHost* proxy = new RenderFrameProxyHost(
-      old_render_frame_host->GetSiteInstance(),
-      old_render_frame_host->render_view_host(),
-      frame_tree_node_);
+      old_render_frame_host->GetSiteInstance(), frame_tree_node_);
   CHECK(proxy_hosts_.insert(std::make_pair(old_site_instance_id, proxy)).second)
       << "Inserting a duplicate item.";
 
@@ -643,9 +641,7 @@
 
     CHECK(!GetRenderFrameProxyHost(site_instance));
     RenderFrameProxyHost* proxy =
-        new RenderFrameProxyHost(site_instance,
-                                 render_frame_host->render_view_host(),
-                                 frame_tree_node_);
+        new RenderFrameProxyHost(site_instance, frame_tree_node_);
     proxy_hosts_[site_instance->GetId()] = proxy;
 
     // Check if the RenderFrameHost is already swapped out, to avoid swapping it
@@ -1519,8 +1515,7 @@
       new_render_frame_host->GetProcess()->AddPendingView();
     } else {
       proxy = new RenderFrameProxyHost(
-          new_render_frame_host->GetSiteInstance(),
-          new_render_frame_host->render_view_host(), frame_tree_node_);
+          new_render_frame_host->GetSiteInstance(), frame_tree_node_);
       proxy_hosts_[instance->GetId()] = proxy;
       proxy_routing_id = proxy->GetRoutingID();
       proxy->TakeFrameHostOwnership(new_render_frame_host.Pass());
@@ -1572,9 +1567,7 @@
     return proxy->GetRoutingID();
 
   if (!proxy) {
-    proxy = new RenderFrameProxyHost(
-        instance, frame_tree_node_->frame_tree()->GetRenderViewHost(instance),
-        frame_tree_node_);
+    proxy = new RenderFrameProxyHost(instance, frame_tree_node_);
     proxy_hosts_[instance->GetId()] = proxy;
   }
   proxy->InitRenderFrameProxy();