Refactor OriginTrialPolicy to be an abstract interface in content/public/common

content/public/common/content_client.h

 // Copyright (c) 2012 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 CONTENT_PUBLIC_COMMON_CONTENT_CLIENT_H_
 #define CONTENT_PUBLIC_COMMON_CONTENT_CLIENT_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 31 matching lines @@
 class TargetPolicy;
 }
 
 namespace content {
 
 class ContentBrowserClient;
 class ContentClient;
 class ContentGpuClient;
 class ContentRendererClient;
 class ContentUtilityClient;
+class OriginTrialPolicy;
 struct CdmInfo;
 struct PepperPluginInfo;
 
 // Setter and getter for the client.  The client should be set early, before any
 // content code is called.
 CONTENT_EXPORT void SetContentClient(ContentClient* client);
 
 #if defined(CONTENT_IMPLEMENTATION)
 // Content's embedder API should only be used by content.
 ContentClient* GetContentClient();
@@ skipping 99 matching lines @@
   // service worker.
   virtual bool AllowScriptExtensionForServiceWorker(const GURL& script_url);
 
   // Returns true if the embedder wishes to supplement the site isolation policy
   // used by the content layer. Returning true enables the infrastructure for
   // out-of-process iframes, and causes the content layer to consult
   // ContentBrowserClient::DoesSiteRequireDedicatedProcess() when making process
   // model decisions.
   virtual bool IsSupplementarySiteIsolationModeEnabled();
 
-  // Returns the public key to be used for origin trials, or an empty string if
-  // origin trials are not enabled in this context.
-  virtual base::StringPiece GetOriginTrialPublicKey();
+  // Returns the origin trial policy, or nullptr if origin trials are not
+  // supported by the embedder.
+  virtual OriginTrialPolicy* GetOriginTrialPolicy();
 
 #if defined(OS_ANDROID)
   // Returns true for clients like Android WebView that uses synchronous
   // compositor. Note setting this to true will permit synchronous IPCs from
   // the browser UI thread.
   virtual bool UsingSynchronousCompositing();
 
   // Returns the MediaClientAndroid to be used by media code on Android.
   virtual media::MediaClientAndroid* GetMediaClientAndroid();
 #endif  // OS_ANDROID
 
  private:
   friend class ContentClientInitializer;  // To set these pointers.
   friend class InternalTestInitializer;
 
   // The embedder API for participating in browser logic.
   ContentBrowserClient* browser_;
   // The embedder API for participating in gpu logic.
   ContentGpuClient* gpu_;
   // The embedder API for participating in renderer logic.
   ContentRendererClient* renderer_;
   // The embedder API for participating in utility logic.
   ContentUtilityClient* utility_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_CONTENT_CLIENT_H_