Don't swap out the old RenderFrameHost until the new one commits.

content/browser/renderer_host/render_view_host_impl.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_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 121 matching lines @@
 
 // static
 const int RenderViewHostImpl::kUnloadTimeoutMS = 1000;
 
 ///////////////////////////////////////////////////////////////////////////////
 // RenderViewHost, public:
 
 // static
 bool RenderViewHostImpl::IsRVHStateActive(RenderViewHostImplState rvh_state) {
   if (rvh_state == STATE_DEFAULT ||
-      rvh_state == STATE_WAITING_FOR_UNLOAD_ACK ||
-      rvh_state == STATE_WAITING_FOR_COMMIT ||
       rvh_state == STATE_WAITING_FOR_CLOSE)
     return true;
   return false;
 }
 
 // static
 RenderViewHost* RenderViewHost::FromID(int render_process_id,
                                        int render_view_id) {
   return RenderViewHostImpl::FromID(render_process_id, render_view_id);
 }
@@ skipping 379 matching lines @@
         // Log a histogram point to help us diagnose how many of those kills
         // we have performed. 1 is the enum value for RendererType Normal for
         // the histogram.
         UMA_HISTOGRAM_PERCENTAGE(
             "BrowserRenderProcessHost.ChildKillsUnresponsive", 1);
       }
     }
   }
 
   switch (rvh_state_) {
-    case STATE_WAITING_FOR_UNLOAD_ACK:
-      SetState(STATE_WAITING_FOR_COMMIT);
-      break;
     case STATE_PENDING_SWAP_OUT:
       SetState(STATE_SWAPPED_OUT);
       break;
     case STATE_PENDING_SHUTDOWN:
       DCHECK(!pending_shutdown_on_swap_out_.is_null());
       pending_shutdown_on_swap_out_.Run();
       break;
     default:
       NOTREACHED();
   }
 }
 
-void RenderViewHostImpl::WasSwappedOut(
-    const base::Closure& pending_delete_on_swap_out) {
-  Send(new ViewMsg_WasSwappedOut(GetRoutingID()));
-  if (rvh_state_ == STATE_WAITING_FOR_UNLOAD_ACK) {
-    SetState(STATE_PENDING_SWAP_OUT);
-    if (!instance_->active_view_count())
-      SetPendingShutdown(pending_delete_on_swap_out);
-  } else if (rvh_state_ == STATE_WAITING_FOR_COMMIT) {
-    SetState(STATE_SWAPPED_OUT);
-  } else if (rvh_state_ == STATE_DEFAULT) {
-    // When the RenderView is not live, the RenderFrameHostManager will call
-    // CommitPending directly, without calling SwapOut on the old RVH. This will
-    // cause WasSwappedOut to be called directly on the live old RVH.
-    DCHECK(!IsRenderViewLive());
-    SetState(STATE_SWAPPED_OUT);
-  } else {
-    NOTREACHED();
-  }
-}
-
 void RenderViewHostImpl::SetPendingShutdown(const base::Closure& on_swap_out) {
   pending_shutdown_on_swap_out_ = on_swap_out;
   SetState(STATE_PENDING_SHUTDOWN);
 }
 
 void RenderViewHostImpl::ClosePage() {
   SetState(STATE_WAITING_FOR_CLOSE);
   StartHangMonitorTimeout(TimeDelta::FromMilliseconds(kUnloadTimeoutMS));
 
   if (IsRenderViewLive()) {
@@ skipping 772 matching lines @@
 void RenderViewHostImpl::DidSelectPopupMenuItem(int selected_index) {
   Send(new ViewMsg_SelectPopupMenuItem(GetRoutingID(), selected_index));
 }
 
 void RenderViewHostImpl::DidCancelPopupMenu() {
   Send(new ViewMsg_SelectPopupMenuItem(GetRoutingID(), -1));
 }
 #endif
 
 bool RenderViewHostImpl::IsWaitingForUnloadACK() const {
-  return rvh_state_ == STATE_WAITING_FOR_UNLOAD_ACK ||
-         rvh_state_ == STATE_WAITING_FOR_CLOSE ||
+  return rvh_state_ == STATE_WAITING_FOR_CLOSE ||
          rvh_state_ == STATE_PENDING_SHUTDOWN ||
          rvh_state_ == STATE_PENDING_SWAP_OUT;
 }
 
 void RenderViewHostImpl::OnTextSurroundingSelectionResponse(
     const base::string16& content,
     size_t start_offset,
     size_t end_offset) {
   if (!view_)
     return;
@@ skipping 186 matching lines @@
   FrameTree* frame_tree = delegate_->GetFrameTree();
 
   frame_tree->ResetForMainFrameSwap();
 }
 
 void RenderViewHostImpl::SelectWordAroundCaret() {
   Send(new ViewMsg_SelectWordAroundCaret(GetRoutingID()));
 }
 
 }  // namespace content