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

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

Index: third_party/WebKit/Source/bindings/core/v8/V8Binding.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8Binding.cpp b/third_party/WebKit/Source/bindings/core/v8/V8Binding.cpp
index 44f8a1e7a85e2a92ee440459aa221eefaba9befa..dacdd97ab2eb6f3992ab807ee2cdd03eb04b5693 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8Binding.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8Binding.cpp
@@ -727,6 +727,30 @@ void registerToExecutionContextForModules(ExecutionContext* (*toExecutionContext
     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());