Support the Clear-Site-Data header on resource requests

content/browser/loader/resource_dispatcher_host_impl.cc

 // 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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 
 #include <stddef.h>
 
@@ skipping 21 matching lines @@
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/timer/timer.h"
 #include "content/browser/appcache/appcache_interceptor.h"
 #include "content/browser/appcache/appcache_navigation_handle_core.h"
 #include "content/browser/appcache/chrome_appcache_service.h"
 #include "content/browser/bad_message.h"
 #include "content/browser/blob_storage/chrome_blob_storage_context.h"
+#include "content/browser/browsing_data/clear_site_data_throttle.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/frame_host/navigation_request_info.h"
 #include "content/browser/loader/async_resource_handler.h"
 #include "content/browser/loader/detachable_resource_handler.h"
 #include "content/browser/loader/intercepting_resource_handler.h"
 #include "content/browser/loader/loader_delegate.h"
 #include "content/browser/loader/mime_sniffing_resource_handler.h"
 #include "content/browser/loader/mojo_async_resource_handler.h"
 #include "content/browser/loader/navigation_resource_handler.h"
 #include "content/browser/loader/navigation_resource_throttle.h"
@@ skipping 301 matching lines @@
           max_num_in_flight_requests_ * kMaxRequestsPerProcessRatio)),
       max_outstanding_requests_cost_per_process_(
           kMaxOutstandingRequestsCostPerProcess),
       largest_outstanding_request_count_seen_(0),
       largest_outstanding_request_per_process_count_seen_(0),
       delegate_(nullptr),
       loader_delegate_(nullptr),
       allow_cross_origin_auth_prompt_(false),
       create_download_handler_intercept_(download_handler_intercept),
       main_thread_task_runner_(base::ThreadTaskRunnerHandle::Get()),
-      io_thread_task_runner_(io_thread_runner) {
+      io_thread_task_runner_(io_thread_runner),
+      experimental_web_features_enabled_(
+          base::CommandLine::ForCurrentProcess()->HasSwitch(
+              switches::kEnableExperimentalWebPlatformFeatures)) {
   DCHECK(main_thread_task_runner_->BelongsToCurrentThread());
   DCHECK(!g_resource_dispatcher_host);
   g_resource_dispatcher_host = this;
 
   ANNOTATE_BENIGN_RACE(
       &last_user_gesture_time_,
       "We don't care about the precise value, see http://crbug.com/92889");
 
   io_thread_task_runner_->PostTask(
       FROM_HERE,
@@ skipping 1174 matching lines @@
                                 resource_type,
                                 &throttles);
   }
 
   if (request->has_upload()) {
     // Request wake lock while uploading data.
     throttles.push_back(
         base::MakeUnique<WakeLockResourceThrottle>(request->url().host()));
   }
 
+  // The experimental Clear-Site-Data throttle.
+  if (experimental_web_features_enabled_) {
+    std::unique_ptr<ResourceThrottle> clear_site_data_throttle =
+        ClearSiteDataThrottle::MaybeCreateThrottleForRequest(request);
+    if (clear_site_data_throttle)
+      throttles.push_back(std::move(clear_site_data_throttle));
+  }
+
   // TODO(ricea): Stop looking this up so much.
   ResourceRequestInfoImpl* info = ResourceRequestInfoImpl::ForRequest(request);
   throttles.push_back(scheduler_->ScheduleRequest(child_id, route_id,
                                                   info->IsAsync(), request));
 
   // Split the handler in two groups: the ones that need to execute
   // WillProcessResponse before mime sniffing and the others.
   std::vector<std::unique_ptr<ResourceThrottle>> pre_mime_sniffing_throttles;
   std::vector<std::unique_ptr<ResourceThrottle>> post_mime_sniffing_throttles;
   for (auto& throttle : throttles) {
@@ skipping 1102 matching lines @@
                                  &throttles);
     if (!throttles.empty()) {
       handler.reset(new ThrottlingResourceHandler(std::move(handler), request,
                                                   std::move(throttles)));
     }
   }
   return handler;
 }
 
 }  // namespace content