Fix IsolateIcelandFrameTreeBrowserTest.ProcessSwitchForIsolatedBlob so that it's not flaky under --…

content/browser/frame_host/frame_tree_browsertest.cc

 // 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.
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "content/browser/frame_host/frame_tree.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
@@ skipping 714 matching lines @@
   // frame initiating the navigation. We disable those checks for this test, to
   // test what happens in a compromise scenario.
   base::CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kDisableWebSecurity);
 
   // Set up an iframe.
   WebContents* contents = shell()->web_contents();
   FrameTreeNode* root =
       static_cast<WebContentsImpl*>(contents)->GetFrameTree()->root();
   GURL main_url(embedded_test_server()->GetURL(
-      "a.com", "/cross_site_iframe_factory.html?a(b)"));
+      "a.com", "/cross_site_iframe_factory.html?a(a)"));
   EXPECT_TRUE(NavigateToURL(shell(), main_url));
 
   // The navigation targets an invalid blob url; that's intentional to trigger
   // an error response. The response should commit in a process dedicated to
   // http://b.is.
   std::string result;
   EXPECT_TRUE(ExecuteScriptAndExtractString(
       root,
       "var iframe_element = document.getElementsByTagName('iframe')[0];"
       "iframe_element.onload = () => {"
       "    domAutomationController.send('done');"
       "};"
       "iframe_element.src = 'blob:http://b.is:2932/';",
       &result));
   WaitForLoadStop(contents);
 
   // Make sure we did a process transfer back to "b.is".
   EXPECT_EQ(
       " Site A ------------ proxies for B\n"
       "   +--Site B ------- proxies for A\n"
       "Where A = http://a.com/\n"
       "      B = http://b.is/",
       FrameTreeVisualizer().DepictFrameTree(root));
 }
 
 }  // namespace content