Drop deprecated memory related notification API

src/api.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/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 5060 matching lines @@
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(exported_isolate);
   ASSERT(isolate == i::Isolate::Current());
   i::DisallowHeapAllocation no_allocation;
 
   VisitorAdapter visitor_adapter(visitor);
   isolate->global_handles()->IterateAllRootsInNewSpaceWithClassIds(
       &visitor_adapter);
 }
 
 
-bool v8::V8::IdleNotification(int hint) {
-  // Returning true tells the caller that it need not
-  // continue to call IdleNotification.
-  i::Isolate* isolate = i::Isolate::Current();
-  if (isolate == NULL || !isolate->IsInitialized()) return true;
-  if (!i::FLAG_use_idle_notification) return true;
-  return isolate->heap()->IdleNotification(hint);
-}
-
-
-void v8::V8::LowMemoryNotification() {
-  i::Isolate* isolate = i::Isolate::Current();
-  if (isolate == NULL || !isolate->IsInitialized()) return;
-  {
-    i::HistogramTimerScope idle_notification_scope(
-        isolate->counters()->gc_low_memory_notification());
-    isolate->heap()->CollectAllAvailableGarbage("low memory notification");
-  }
-}
-
-
-int v8::V8::ContextDisposedNotification() {
-  i::Isolate* isolate = i::Isolate::Current();
-  if (!isolate->IsInitialized()) return 0;
-  return isolate->heap()->NotifyContextDisposed();
-}
-
-
 bool v8::V8::InitializeICU(const char* icu_data_file) {
   return i::InitializeICU(icu_data_file);
 }
 
 
 const char* v8::V8::GetVersion() {
   return i::Version::GetVersion();
 }
 
 
@@ skipping 2543 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal