Revert of Remove about:srcdoc url conversion.

content/browser/site_per_process_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 "content/browser/site_per_process_browsertest.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 8756 matching lines @@
 
 // Ensure that an iframe that navigates cross-site doesn't use the same process
 // as its parent. Then when its parent navigates it via the "srcdoc" attribute,
 // it must reuse its parent's process.
 IN_PROC_BROWSER_TEST_F(SitePerProcessBrowserTest,
                        IframeSrcdocAfterCrossSiteNavigation) {
   GURL parent_url(embedded_test_server()->GetURL(
       "a.com", "/cross_site_iframe_factory.html?a(b)"));
   GURL child_url(embedded_test_server()->GetURL(
       "b.com", "/cross_site_iframe_factory.html?b()"));
-  GURL srcdoc_url(kAboutSrcDocURL);
+  GURL blank_url(url::kAboutBlankURL);
 
   // #1 Navigate to a page with a cross-site iframe.
   EXPECT_TRUE(NavigateToURL(shell(), parent_url));
 
   // Ensure that the iframe uses its own process.
   FrameTreeNode* root = web_contents()->GetFrameTree()->root();
   ASSERT_EQ(1u, root->child_count());
   FrameTreeNode* child = root->child_at(0);
   EXPECT_EQ(parent_url, root->current_url());
   EXPECT_EQ(child_url, child->current_url());
   EXPECT_NE(root->current_frame_host()->GetSiteInstance(),
             child->current_frame_host()->GetSiteInstance());
   EXPECT_NE(root->current_frame_host()->GetProcess(),
             child->current_frame_host()->GetProcess());
 
   // #2 Navigate the iframe to its srcdoc attribute.
   TestNavigationObserver load_observer(shell()->web_contents());
   EXPECT_TRUE(ExecuteScript(
       root, "document.getElementById('child-0').srcdoc = 'srcdoc content';"));
   load_observer.Wait();
 
   // Ensure that the iframe reuses its parent's process.
-  EXPECT_EQ(srcdoc_url, child->current_url());
+  EXPECT_EQ(blank_url, child->current_url());
   EXPECT_EQ(root->current_frame_host()->GetSiteInstance(),
             child->current_frame_host()->GetSiteInstance());
   EXPECT_EQ(root->current_frame_host()->GetProcess(),
             child->current_frame_host()->GetProcess());
 }
 
 }  // namespace content