Remove RFHM::GetNavigatingWebUI() and RFHM::web_ui().

content/browser/frame_host/render_frame_host_manager_browsertest.cc

Index: content/browser/frame_host/render_frame_host_manager_browsertest.cc
diff --git a/content/browser/frame_host/render_frame_host_manager_browsertest.cc b/content/browser/frame_host/render_frame_host_manager_browsertest.cc
index 3a08755a23879f046842b17a5f0d339ee3037b83..2586c970338eb48694cb4285396f0488931c0b3b 100644
--- a/content/browser/frame_host/render_frame_host_manager_browsertest.cc
+++ b/content/browser/frame_host/render_frame_host_manager_browsertest.cc
@@ -1543,18 +1543,15 @@ IN_PROC_BROWSER_TEST_F(RenderFrameHostManagerTest,
                   shell()->web_contents()->GetRenderProcessHost()->GetID()));
   WebContentsImpl* web_contents = static_cast<WebContentsImpl*>(
       shell()->web_contents());
-  WebUIImpl* webui = web_contents->GetRenderManagerForTesting()->web_ui();
+  FrameTreeNode* root = web_contents->GetFrameTree()->root();
+  WebUIImpl* webui = root->current_frame_host()->web_ui();
   EXPECT_TRUE(webui);
-  EXPECT_FALSE(
-      web_contents->GetRenderManagerForTesting()->GetNavigatingWebUI());
 
   // Navigate to another WebUI URL that reuses the WebUI object.  Make sure we
   // clear GetNavigatingWebUI() when it commits.
   GURL webui_url2(webui_url.spec() + "#foo");
   NavigateToURL(shell(), webui_url2);
-  EXPECT_EQ(webui, web_contents->GetRenderManagerForTesting()->web_ui());
-  EXPECT_FALSE(
-      web_contents->GetRenderManagerForTesting()->GetNavigatingWebUI());
+  EXPECT_EQ(webui, root->current_frame_host()->web_ui());
 }
 
 class RFHMProcessPerTabTest : public RenderFrameHostManagerTest {