Low memory page navigation GC for low end devices

third_party/WebKit/Source/core/exported/WebFrame.cpp

 // Copyright 2014 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 "public/web/WebFrame.h"
 
 #include <algorithm>
 #include "bindings/core/v8/WindowProxyManager.h"
 #include "core/HTMLNames.h"
 #include "core/dom/IncrementLoadEventDelayCount.h"
@@ skipping 66 matching lines @@
     SetOpener(nullptr);
   }
   opened_frame_tracker_->TransferTo(frame);
 
   Page* page = old_frame->GetPage();
   AtomicString name = old_frame->Tree().GetName();
   FrameOwner* owner = old_frame->Owner();
 
   v8::HandleScope handle_scope(v8::Isolate::GetCurrent());
   WindowProxyManager::GlobalProxyVector global_proxies;
-  old_frame->GetWindowProxyManager()->ClearForNavigation();
+  old_frame->GetWindowProxyManager()->ClearForSwap();
   old_frame->GetWindowProxyManager()->ReleaseGlobalProxies(global_proxies);
 
   // Although the Document in this frame is now unloaded, many resources
   // associated with the frame itself have not yet been freed yet.
   old_frame->Detach(FrameDetachType::kSwap);
 
   // Clone the state of the current Frame into the one being swapped in.
   // FIXME: This is a bit clunky; this results in pointless decrements and
   // increments of connected subframes.
   if (frame->IsWebLocalFrame()) {
@@ skipping 258 matching lines @@
 Frame* WebFrame::ToCoreFrame(const WebFrame& frame) {
   if (frame.IsWebLocalFrame())
     return ToWebLocalFrameBase(frame).GetFrame();
   if (frame.IsWebRemoteFrame())
     return ToWebRemoteFrameBase(frame).GetFrame();
   NOTREACHED();
   return nullptr;
 }
 
 }  // namespace blink