First experimental implementation of the Clear-Site-Data header

content/browser/frame_host/navigation_handle_impl.cc

 // Copyright 2015 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.
 
 #include "content/browser/frame_host/navigation_handle_impl.h"
 
 #include <utility>
 
+#include "base/command_line.h"
 #include "base/logging.h"
+#include "content/browser/browsing_data/clear_site_data_throttle.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/frame_host/navigator.h"
 #include "content/browser/frame_host/navigator_delegate.h"
 #include "content/browser/service_worker/service_worker_context_wrapper.h"
 #include "content/browser/service_worker/service_worker_navigation_handle.h"
 #include "content/common/frame_messages.h"
 #include "content/common/resource_request_body.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/common/browser_side_navigation_policy.h"
 #include "content/public/common/content_client.h"
+#include "content/public/common/content_switches.h"
 #include "net/url_request/redirect_info.h"
 #include "url/gurl.h"
 #include "url/url_constants.h"
 
 namespace content {
 
 namespace {
 
 void UpdateThrottleCheckResult(
     NavigationThrottle::ThrottleCheckResult* to_update,
     NavigationThrottle::ThrottleCheckResult result) {
   *to_update = result;
 }
 
+bool AreExperimentalFeaturesEnabled() {
+  return base::CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableExperimentalWebPlatformFeatures);
+}
+
 }  // namespace
 
 // static
 std::unique_ptr<NavigationHandleImpl> NavigationHandleImpl::Create(
     const GURL& url,
     FrameTreeNode* frame_tree_node,
     bool is_renderer_initiated,
     bool is_synchronous,
     bool is_srcdoc,
     const base::TimeTicks& navigation_start,
@@ skipping 132 matching lines @@
   CHECK_NE(INITIAL, state_)
       << "This accessor should not be called before the request is started.";
   return is_external_protocol_;
 }
 
 net::Error NavigationHandleImpl::GetNetErrorCode() {
   return net_error_code_;
 }
 
 RenderFrameHostImpl* NavigationHandleImpl::GetRenderFrameHost() {
-  CHECK(state_ >= READY_TO_COMMIT)
+  CHECK(state_ >= WILL_PROCESS_RESPONSE)

[melandory, 2016/06/15 08:12:34]

also fix comment in navigation_handle.h (see here
https://codereview.chromium.org/2060313002/)

[msramek, 2016/06/15 18:00:40]

Done. I have updated the comment, but I didn't exactly follow the example of
your CL, since it seems to still be in discussion. I will update it once it's
resolved, or rebase on your CL if you land first.

       << "This accessor should only be called "
-         "after the navigation is ready to commit.";
+         "after a response has been received.";
   return render_frame_host_;
 }
 
 bool NavigationHandleImpl::IsSamePage() {
   DCHECK(state_ == DID_COMMIT || state_ == DID_COMMIT_ERROR_PAGE)
       << "This accessor should not be called before the navigation has "
          "committed.";
   return is_same_page_;
 }
 
@@ skipping 122 matching lines @@
   if (method_ == "POST")
     resource_request_body_ = resource_request_body;
   sanitized_referrer_ = sanitized_referrer;
   has_user_gesture_ = has_user_gesture;
   transition_ = transition;
   is_external_protocol_ = is_external_protocol;
 
   state_ = WILL_SEND_REQUEST;
   complete_callback_ = callback;
 
-  // Register the navigation throttles. The ScopedVector returned by
+  // Register the platform's navigation throttles.
+  if (AreExperimentalFeaturesEnabled()) {
+    std::unique_ptr<content::NavigationThrottle> clear_site_data_throttle =
+        content::ClearSiteDataThrottle::CreateThrottleFor(this);
+    throttles_.push_back(std::move(clear_site_data_throttle));
+  }
+
+  // Register the embedder's navigation throttles. The ScopedVector returned by
   // GetNavigationThrottles is not assigned to throttles_ directly because it
   // would overwrite any throttle previously added with
   // RegisterThrottleForTesting.
   ScopedVector<NavigationThrottle> throttles_to_register =
       GetContentClient()->browser()->CreateThrottlesForNavigation(this);
   if (throttles_to_register.size() > 0) {
     throttles_.insert(throttles_.end(), throttles_to_register.begin(),
                       throttles_to_register.end());
     throttles_to_register.weak_clear();
   }
@@ skipping 190 matching lines @@
   complete_callback_.Reset();
 
   if (!callback.is_null())
     callback.Run(result);
 
   // No code after running the callback, as it might have resulted in our
   // destruction.
 }
 
 }  // namespace content