Remove resource_context.h include from resource_loader.cc.

content/public/browser/resource_context.h

Index: content/public/browser/resource_context.h
diff --git a/content/public/browser/resource_context.h b/content/public/browser/resource_context.h
index 022a338f8f34025581ce40a5084e9e94b85136b5..41eb18e585ee1907cb96c2e9e154b440ac80fa26 100644
--- a/content/public/browser/resource_context.h
+++ b/content/public/browser/resource_context.h
@@ -18,7 +18,6 @@
 class GURL;
 
 namespace net {
-class ClientCertStore;
 class HostResolver;
 class KeygenHandler;
 class URLRequestContext;
@@ -42,9 +41,6 @@ class CONTENT_EXPORT ResourceContext : public base::SupportsUserData {
   // with a BrowsingContext.
   virtual net::URLRequestContext* GetRequestContext() = 0;
 
-  // Get platform ClientCertStore. May return nullptr.
-  virtual std::unique_ptr<net::ClientCertStore> CreateClientCertStore();
-
   // Create a platform KeygenHandler and pass it to |callback|. The |callback|
   // may be run synchronously.
   virtual void CreateKeygenHandler(