[Origin Trials] Install origin trial bindings on V8 context conditionally

third_party/WebKit/Source/bindings/core/v8/V8Binding.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 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 709 matching lines @@
         return V8WorkerGlobalScope::toImpl(workerWrapper)->getExecutionContext();
     ASSERT(s_toExecutionContextForModules);
     return (*s_toExecutionContextForModules)(context);
 }
 
 void registerToExecutionContextForModules(ExecutionContext* (*toExecutionContextForModules)(v8::Local<v8::Context>))
 {
     s_toExecutionContextForModules = toExecutionContextForModules;
 }
 
+void initializeOriginTrialsCore(v8::Local<v8::Context> context, const DOMWrapperWorld& world)
+{
+    DCHECK(!context.IsEmpty());
+    context->Enter();
+    // Initialization code for origin trials for core bindings should go here
+    context->Exit();
+}
+
+namespace {
+initializeOriginTrialsFunction s_initializeOriginTrialsFunction = &initializeOriginTrialsCore;
+}
+
+void initializeOriginTrials(v8::Local<v8::Context> context, const DOMWrapperWorld& world)
+{
+    (*s_initializeOriginTrialsFunction)(context, world);
+}
+
+initializeOriginTrialsFunction setInitializeOriginTrialsFunction(initializeOriginTrialsFunction fn)
+{
+    initializeOriginTrialsFunction originalFunction = s_initializeOriginTrialsFunction;
+    s_initializeOriginTrialsFunction = fn;
+    return originalFunction;
+}
+
 ExecutionContext* currentExecutionContext(v8::Isolate* isolate)
 {
     return toExecutionContext(isolate->GetCurrentContext());
 }
 
 ExecutionContext* enteredExecutionContext(v8::Isolate* isolate)
 {
     ExecutionContext* context = toExecutionContext(isolate->GetEnteredContext());
     if (!context) {
         // We don't always have an entered execution context, for example during microtask callbacks from V8
@@ skipping 180 matching lines @@
     v8SetReturnValue(info, perContextData->constructorForType(WrapperTypeInfo::unwrap(data)));
 }
 
 v8::Local<v8::Value> freezeV8Object(v8::Local<v8::Value> value, v8::Isolate* isolate)
 {
     v8CallOrCrash(value.As<v8::Object>()->SetIntegrityLevel(isolate->GetCurrentContext(), v8::IntegrityLevel::kFrozen));
     return value;
 }
 
 } // namespace blink