Allow origin trials to be enabled by script

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ConditionalFeatures_h
 #define ConditionalFeatures_h
 
-#include "bindings/core/v8/DOMWrapperWorld.h"
 #include "core/CoreExport.h"
 #include "platform/feature_policy/FeaturePolicy.h"
+#include "wtf/text/WTFString.h"
 #include <v8.h>
 
 namespace blink {
 
+class LocalFrame;
 class ScriptState;
-class LocalFrame;
+struct WrapperTypeInfo;
 
 using InstallConditionalFeaturesFunction = void (*)(const WrapperTypeInfo*,
                                                     const ScriptState*,
                                                     v8::Local<v8::Object>,
                                                     v8::Local<v8::Function>);
 
+using InstallPendingConditionalFeatureFunction = void (*)(const String&,
+                                                          const ScriptState*);
+
+// Sets the function to be called by |installConditionalFeatures|. The function
+// is initially set to the private |installConditionalFeaturesCore| function,
+// but can be overridden by this function. A pointer to the previously set
+// function is returned, so that functions can be chained.
+CORE_EXPORT InstallConditionalFeaturesFunction
+    setInstallConditionalFeaturesFunction(InstallConditionalFeaturesFunction);
+
+// Sets the function to be called by |installPendingConditionalFeature|. This
+// Initially set to the private |installPendingConditionalFeatureCore| function,
+// but can be overridden by this function. A pointer to the previously set
+// function is returned, so that functions can be chained.
+CORE_EXPORT InstallPendingConditionalFeatureFunction
+    setInstallPendingConditionalFeatureFunction(
+        InstallPendingConditionalFeatureFunction);
+
 // Installs all of the conditionally enabled V8 bindings for the given type, in
 // a specific context. This is called in V8PerContextData, after the constructor
 // and prototype for the type have been created. It indirectly calls the
 // function set by |setInstallConditionalFeaturesFunction|.
 CORE_EXPORT void installConditionalFeatures(const WrapperTypeInfo*,
                                             const ScriptState*,
                                             v8::Local<v8::Object>,
                                             v8::Local<v8::Function>);
 
-// Sets the function to be called by |installConditionalFeatures|. The function
-// is initially set to the private |installConditionalFeaturesCore| function,
-// but can be overridden by this function. A pointer to the previously set
-// function is returned, so that functions can be chained.
-CORE_EXPORT InstallConditionalFeaturesFunction
-    setInstallConditionalFeaturesFunction(InstallConditionalFeaturesFunction);
-
 // Installs all of the conditionally enabled V8 bindings on the Window object.
 // This is called separately from other objects so that attributes and
 // interfaces which need to be visible on the global object are installed even
 // when the V8 context is reused (i.e., after navigation)
-CORE_EXPORT void installPendingConditionalFeaturesOnWindow(const ScriptState*);
+CORE_EXPORT void installConditionalFeaturesOnWindow(const ScriptState*);
+
+// Installs all of the conditionally enabled V8 bindings for a feature, if
+// needed. This is called to install a newly-enabled feature on any existing
+// objects. If the target object hasn't been created, nothing is installed. The
+// enabled feature will be instead be installed when the object is created
+// (avoids forcing the creation of objects prematurely).
+CORE_EXPORT void installPendingConditionalFeature(const String&,
+                                                  const ScriptState*);
 
 CORE_EXPORT bool isFeatureEnabledInFrame(const FeaturePolicy::Feature&,
                                          const LocalFrame*);
 
 }  // namespace blink
 
 #endif  // ConditionalFeatures_h