Shortcut cross-process frame transfers to avoid pending NavigationEntries.

content/browser/cross_site_transfer_browsertest.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.
 
 #include "base/command_line.h"
 #include "base/strings/stringprintf.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/resource_dispatcher_host_delegate.h"
 #include "content/public/browser/resource_throttle.h"
@@ skipping 126 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(TrackingResourceDispatcherHostDelegate);
 };
 
 // WebContentsDelegate that fails to open a URL when there's a request that
 // needs to be transferred between renderers.
 class NoTransferRequestDelegate : public WebContentsDelegate {
  public:
   NoTransferRequestDelegate() {}
 
-  WebContents* OpenURLFromTab(WebContents* source,
-                              const OpenURLParams& params) override {
-    bool is_transfer =
-        (params.transferred_global_request_id != GlobalRequestID());
-    if (is_transfer)
-      return nullptr;
-    NavigationController::LoadURLParams load_url_params(params.url);
-    load_url_params.referrer = params.referrer;
-    load_url_params.frame_tree_node_id = params.frame_tree_node_id;
-    load_url_params.transition_type = params.transition;
-    load_url_params.extra_headers = params.extra_headers;
-    load_url_params.should_replace_current_entry =
-        params.should_replace_current_entry;
-    load_url_params.is_renderer_initiated = true;
-    source->GetController().LoadURLWithParams(load_url_params);
-    return source;
+  bool ShouldTransferNavigation() override {
+    // Intentionally cancel the transfer.
+    return false;
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NoTransferRequestDelegate);
 };
 
 class CrossSiteTransferTest : public ContentBrowserTest {
  public:
   CrossSiteTransferTest() : old_delegate_(nullptr) {}
 
@@ skipping 251 matching lines @@
   EXPECT_EQ(0, controller.GetCurrentEntryIndex());
   EXPECT_EQ(url1, controller.GetEntryAtIndex(0)->GetURL());
 
   // Make sure the request for url2 did not complete.
   EXPECT_FALSE(tracking_delegate().WaitForTrackedURLAndGetCompleted());
 
   shell()->web_contents()->SetDelegate(old_delegate);
 }
 
 }  // namespace content