[Experimental Framework] Make the OriginTrialContext a member of ExecutionContext

third_party/WebKit/Source/core/dom/ExecutionContext.h

Index: third_party/WebKit/Source/core/dom/ExecutionContext.h
diff --git a/third_party/WebKit/Source/core/dom/ExecutionContext.h b/third_party/WebKit/Source/core/dom/ExecutionContext.h
index 8bb226bb9765fe1e640d58f245466a0ab36f3821..e5e67bc093ad7d033c423945fd67383054a2718f 100644
--- a/third_party/WebKit/Source/core/dom/ExecutionContext.h
+++ b/third_party/WebKit/Source/core/dom/ExecutionContext.h
@@ -53,6 +53,7 @@ class EventQueue;
 class EventTarget;
 class ExecutionContextTask;
 class LocalDOMWindow;
+class OriginTrialContext;
 class PublicURLManager;
 class SecurityOrigin;
 class ScriptCallStack;
@@ -155,6 +156,9 @@ public:
     virtual void setReferrerPolicy(ReferrerPolicy);
     ReferrerPolicy getReferrerPolicy() const { return m_referrerPolicy; }
 
+    // Override to enable experimental features through origin trials
+    virtual PassOwnPtrWillBeRawPtr<OriginTrialContext> createOriginTrialContext();
+
 protected:
     ExecutionContext();
     virtual ~ExecutionContext();