Get ClientCertStore through ResourceContext.

content/public/browser/resource_context.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_BROWSER_RESOURCE_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_RESOURCE_CONTEXT_H_
 
 #include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/supports_user_data.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 
 class GURL;
 
 namespace appcache {
 class AppCacheService;
 }
 
 namespace net {
+class ClientCertStore;
 class HostResolver;
 class URLRequestContext;
 }
 
 namespace content {
 
 // ResourceContext contains the relevant context information required for
 // resource loading. It lives on the IO thread, although it is constructed on
 // the UI thread. It must be destructed on the IO thread.
 class CONTENT_EXPORT ResourceContext : public base::SupportsUserData {
  public:
 #if defined(OS_IOS)
   virtual ~ResourceContext() {}
 #else
   ResourceContext();
   virtual ~ResourceContext();
 #endif
   virtual net::HostResolver* GetHostResolver() = 0;
 
   // DEPRECATED: This is no longer a valid given isolated apps/sites and
   // storage partitioning. This getter returns the default context associated
   // with a BrowsingContext.
   virtual net::URLRequestContext* GetRequestContext() = 0;
 
+  // Get platform ClientCertStore. May return NULL.
+  virtual scoped_ptr<net::ClientCertStore> GetClientCertStore();

[wtc, 2013/10/28 19:41:12]

It is strange to see this method returns a scoped_ptr whereas the two preceding
methods return a plain pointer.

Why isn't this method an abstract method (= 0)?

[mattm, 2013/10/28 23:56:16]

Should be addressed by the name change.
John mentioned, the new convention for content interfaces is to provide an empty
implementation instead of pure virtual. The other ones are from before that
convention.

+
   // Returns true if microphone access is allowed for |origin|. Used to
   // determine what level of authorization is given to |origin| to access
   // resource metadata.
   virtual bool AllowMicAccess(const GURL& origin) = 0;
 
   // Returns true if web camera access is allowed for |origin|. Used to
   // determine what level of authorization is given to |origin| to access
   // resource metadata.
   virtual bool AllowCameraAccess(const GURL& origin) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RESOURCE_CONTEXT_H_