Remove a macro-generated function for a private property of PopStateEvent

This CL removes a macro-generated fucntion for a private property of PopStateEvent, and replaces it with the new API GetSymbol, which uses an instance address of V8PrivateProperty::SymbolKey as a key to get Symbol.

Bug: 715418
Change-Id: Iaabcd308a18c20eabfa5c4c53ec32d5b72cd4fbf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1893481Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
Commit-Queue: Marina Sakai <marinasakai@google.com>
Cr-Commit-Position: refs/heads/master@{#711627}

third_party/blink/renderer/bindings/core/v8/custom/v8_pop_state_event_custom.cc

@@ -37,12 +37,15 @@
 
 namespace blink {
 
+const V8PrivateProperty::SymbolKey kPrivatePropertyState;
+
 // Save the state value to a hidden attribute in the V8PopStateEvent, and return
 // it, for convenience.
 static v8::Local<v8::Value> CacheState(ScriptState* script_state,
                                        v8::Local<v8::Object> pop_state_event,
                                        v8::Local<v8::Value> state) {
-  V8PrivateProperty::GetPopStateEventState(script_state->GetIsolate())
+  V8PrivateProperty::GetSymbol(script_state->GetIsolate(),
+                               kPrivatePropertyState)
       .Set(pop_state_event, state);
   return state;
 }
@@ -52,7 +55,7 @@ void V8PopStateEvent::StateAttributeGetterCustom(
   v8::Isolate* isolate = info.GetIsolate();
   ScriptState* script_state = ScriptState::Current(isolate);
   V8PrivateProperty::Symbol property_symbol =
-      V8PrivateProperty::GetPopStateEventState(isolate);
+      V8PrivateProperty::GetSymbol(isolate, kPrivatePropertyState);
   v8::Local<v8::Value> result;
 
   if (property_symbol.GetOrUndefined(info.Holder()).ToLocal(&result) &&

third_party/blink/renderer/platform/bindings/v8_private_property.h

@@ -28,7 +28,6 @@ class ScriptWrappable;
   X(Global, Event)                                      \
   X(MessageEvent, CachedData)                           \
   X(NamedConstructor, Initialized)                      \
-  X(PopStateEvent, State)                               \
   SCRIPT_PROMISE_PROPERTIES(X, Promise)                 \
   SCRIPT_PROMISE_PROPERTIES(X, Resolver)