Revert of Don't ensure, in single-process mode, that WebUI render views are the only ones in the process, as …

content/browser/frame_host/render_frame_host_manager_unittest.cc

Index: content/browser/frame_host/render_frame_host_manager_unittest.cc
diff --git a/content/browser/frame_host/render_frame_host_manager_unittest.cc b/content/browser/frame_host/render_frame_host_manager_unittest.cc
index f056fa9d05bbc5b46d555ebabc6c76ccf8fa7c57..23b49c8cde575de2dec6b95bc533236b58a864e0 100644
--- a/content/browser/frame_host/render_frame_host_manager_unittest.cc
+++ b/content/browser/frame_host/render_frame_host_manager_unittest.cc
@@ -1036,37 +1036,6 @@
   manager2->DidNavigateFrame(host2);
 }
 
-// Test that WebUI can be navigated to in single-process mode.
-TEST_F(RenderFrameHostManagerTest,
-       CanNavigateBetweenNormalPagesAndWebUIInSingleProcess) {
-  const GURL kNormalUrl1("http://chromium.org");
-  const GURL kNormalUrl2("http://example.com");
-  const GURL kWebUIUrl("chrome://foo");
-
-  // We both set flag on RenderProcesHost and append the switch due to the fact
-  // that some code checks the switch directly instead of relying
-  // on RenderProcessHost
-  RenderProcessHost::SetRunRendererInProcess(true);
-  CommandLine::ForCurrentProcess()->AppendSwitch(switches::kSingleProcess);
-  set_should_create_webui(true);
-
-  RenderFrameHostManager* manager = static_cast<TestWebContents*>(
-      web_contents())->GetRenderManagerForTesting();
-
-  NavigateAndCommit(kNormalUrl1);
-  EXPECT_EQ(kNormalUrl1,
-            manager->current_frame_host()->GetSiteInstance()->GetSiteURL());
-  EXPECT_FALSE(manager->web_ui());
-  NavigateAndCommit(kWebUIUrl);
-  EXPECT_EQ(kWebUIUrl,
-            manager->current_frame_host()->GetSiteInstance()->GetSiteURL());
-  EXPECT_TRUE(manager->web_ui());
-  NavigateAndCommit(kNormalUrl2);
-  EXPECT_EQ(kNormalUrl2,
-            manager->current_frame_host()->GetSiteInstance()->GetSiteURL());
-  EXPECT_FALSE(manager->web_ui());
-}
-
 // Tests that we don't end up in an inconsistent state if a page does a back and
 // then reload. http://crbug.com/51680
 TEST_F(RenderFrameHostManagerTest, PageDoesBackAndReload) {