Activate memory reducer after context disposal of the main window.

src/heap/heap.cc

 // Copyright 2012 the V8 project 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 "src/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/bits.h"
 #include "src/base/once.h"
@@ skipping 1009 matching lines @@
   }
 
   return next_gc_likely_to_collect_more;
 }
 
 
 int Heap::NotifyContextDisposed(bool dependant_context) {
   if (!dependant_context) {
     tracer()->ResetSurvivalEvents();
     old_generation_size_configured_ = false;
+    MemoryReducer::Event event;
+    event.type = MemoryReducer::kContextDisposed;
+    event.time_ms = MonotonicallyIncreasingTimeInMs();
+    memory_reducer_->NotifyContextDisposed(event);
   }
   if (isolate()->concurrent_recompilation_enabled()) {
     // Flush the queued recompilation tasks.
     isolate()->optimizing_compile_dispatcher()->Flush();
   }
   AgeInlineCaches();
   set_retained_maps(ArrayList::cast(empty_fixed_array()));
   tracer()->AddContextDisposalTime(MonotonicallyIncreasingTimeInMs());
-  MemoryReducer::Event event;
-  event.type = MemoryReducer::kContextDisposed;
-  event.time_ms = MonotonicallyIncreasingTimeInMs();
-  memory_reducer_->NotifyContextDisposed(event);
   return ++contexts_disposed_;
 }
 
 
 void Heap::StartIncrementalMarking(int gc_flags,
                                    const GCCallbackFlags gc_callback_flags,
                                    const char* reason) {
   DCHECK(incremental_marking()->IsStopped());
   set_current_gc_flags(gc_flags);
   current_gc_callback_flags_ = gc_callback_flags;
@@ skipping 5099 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8