Teach the network service to clear its disk cache if requested.

mojo/services/network/network_context.h

 // Copyright 2014 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 MOJO_SERVICES_NETWORK_NETWORK_CONTEXT_H_
 #define MOJO_SERVICES_NETWORK_NETWORK_CONTEXT_H_
 
 #include <set>
 
+#include "base/callback.h"
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/task_runner.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace net {
 class URLRequestContext;
 }
 
 namespace mojo {
 class URLLoader;
 class URLLoaderImpl;
 
 class NetworkContext {
  public:
+  // Cleares the cached content. The actual deletion will be performed using the
+  // given task runner, but cache appears as cleared immediately after the
+  // function returns.
+  static void ClearCache(const base::FilePath& base_path,
+                         scoped_refptr<base::TaskRunner> task_runner,
+                         const base::Closure& clear_finished_callback);
+
   explicit NetworkContext(
       scoped_ptr<net::URLRequestContext> url_request_context);
   explicit NetworkContext(const base::FilePath& base_path);
   ~NetworkContext();
 
   net::URLRequestContext* url_request_context() {
     return url_request_context_.get();
   }
 
   // These are called by individual url loaders as they are being created and
@@ skipping 21 matching lines @@
   // Set when entering the destructor, in order to avoid manipulations of the
   // |url_loaders_| (as a url_loader might delete itself in Cleanup()).
   bool in_shutdown_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkContext);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_NETWORK_NETWORK_CONTEXT_H_