Factor out gin::IsolateHolder's constructor

third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.h

Index: third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.h b/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.h
index 305bab8632d8c10ff2417c8c4d30df725a0ce13c..41e17fda64e5497c6b4147a59b8b0862784ba7e3 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.h
+++ b/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.h
@@ -47,7 +47,6 @@ class ActiveScriptWrappableBase;
 class DOMDataStore;
 class StringCache;
 class V8PrivateProperty;
-class WebTaskRunner;
 struct WrapperTypeInfo;
 
 typedef WTF::Vector<DOMDataStore*> DOMDataStoreList;
@@ -97,7 +96,7 @@ class CORE_EXPORT V8PerIsolateData {
     virtual ~Data() = default;
   };
 
-  static v8::Isolate* initialize(WebTaskRunner*);
+  static v8::Isolate* initialize(std::unique_ptr<gin::IsolateHolder>);
 
   static V8PerIsolateData* from(v8::Isolate* isolate) {
     ASSERT(isolate);
@@ -212,7 +211,7 @@ class CORE_EXPORT V8PerIsolateData {
   }
 
  private:
-  explicit V8PerIsolateData(WebTaskRunner*);
+  explicit V8PerIsolateData(std::unique_ptr<gin::IsolateHolder>);
   ~V8PerIsolateData();
 
   typedef HashMap<const void*, v8::Eternal<v8::FunctionTemplate>>