Low memory page navigation GC for low end devices

third_party/WebKit/Source/bindings/core/v8/LocalWindowProxy.cpp

 /*
  * Copyright (C) 2008, 2009, 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 46 matching lines @@
 #include "platform/bindings/V8PrivateProperty.h"
 #include "platform/heap/Handle.h"
 #include "platform/instrumentation/tracing/TraceEvent.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "platform/weborigin/SecurityViolationReportingPolicy.h"
 #include "platform/wtf/Assertions.h"
 #include "v8/include/v8.h"
 
 namespace blink {
 
-void LocalWindowProxy::DisposeContext(Lifecycle next_status) {
+void LocalWindowProxy::DisposeContext(Lifecycle next_status,
+                                      FrameReuseStatus frame_reuse_status) {
   DCHECK(next_status == Lifecycle::kGlobalObjectIsDetached ||
          next_status == Lifecycle::kFrameIsDetached);
 
   if (lifecycle_ != Lifecycle::kContextIsInitialized)
     return;
 
   ScriptState::Scope scope(script_state_.Get());
   v8::Local<v8::Context> context = script_state_->GetContext();
   // The embedder could run arbitrary code in response to the
   // willReleaseScriptContext callback, so all disposing should happen after
@@ skipping 14 matching lines @@
     }
     V8DOMWrapper::ClearNativeInfo(GetIsolate(), context->Global());
     script_state_->DetachGlobalObject();
 
 #if DCHECK_IS_ON()
     DidDetachGlobalObject();
 #endif
   }
 
   script_state_->DisposePerContextData();
-
   // It's likely that disposing the context has created a lot of
   // garbage. Notify V8 about this so it'll have a chance of cleaning
   // it up when idle.
   V8GCForContextDispose::Instance().NotifyContextDisposed(
-      GetFrame()->IsMainFrame());
+      GetFrame()->IsMainFrame(), frame_reuse_status);
 
   if (next_status == Lifecycle::kFrameIsDetached) {
     // The context's frame is detached from the DOM, so there shouldn't be a
     // strong reference to the context.
     global_proxy_.SetPhantom();
   }
 
   DCHECK_EQ(lifecycle_, Lifecycle::kContextIsInitialized);
   lifecycle_ = next_status;
 }
@@ skipping 350 matching lines @@
 
   SetSecurityToken(origin);
 }
 
 LocalWindowProxy::LocalWindowProxy(v8::Isolate* isolate,
                                    LocalFrame& frame,
                                    RefPtr<DOMWrapperWorld> world)
     : WindowProxy(isolate, frame, std::move(world)) {}
 
 }  // namespace blink