Remove usages of WebContents::GetRenderViewHost().

This CL was uploaded by git cl split.

R=antrim@chromium.org

Bug: 1142671
Change-Id: I19f9ac69a3da5fb06c5bb76f365e037b411d7eeb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2500214
Auto-Submit: Lucas Gadani <lfg@chromium.org>
Reviewed-by: Denis Kuznetsov [CET] <antrim@chromium.org>
Commit-Queue: Denis Kuznetsov [CET] <antrim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821215}

chrome/browser/ui/webui/settings_utils_linux.cc

@@ -145,9 +145,13 @@ namespace settings_utils {
 void ShowNetworkProxySettings(content::WebContents* web_contents) {
   base::ThreadPool::PostTask(
       FROM_HERE, {base::TaskPriority::USER_VISIBLE, base::MayBlock()},
-      base::BindOnce(&DetectAndStartProxyConfigUtil,
-                     web_contents->GetRenderViewHost()->GetProcess()->GetID(),
-                     web_contents->GetRenderViewHost()->GetRoutingID()));
+      base::BindOnce(
+          &DetectAndStartProxyConfigUtil,
+          web_contents->GetMainFrame()
+              ->GetRenderViewHost()
+              ->GetProcess()
+              ->GetID(),
+          web_contents->GetMainFrame()->GetRenderViewHost()->GetRoutingID()));
 }
 
 }  // namespace settings_utils

chrome/browser/ui/webui/webui_webview_browsertest.cc

@@ -337,7 +337,7 @@ IN_PROC_BROWSER_TEST_F(WebUIWebViewBrowserTest, DISABLED_DragAndDropToInput) {
   // Flush any pending events to make sure we start with a clean slate.
   content::RunAllPendingInMessageLoop();
   content::RenderViewHost* const render_view_host =
-      embedder_web_contents->GetRenderViewHost();
+      embedder_web_contents->GetMainFrame()->GetRenderViewHost();
 
   gfx::NativeView view = embedder_web_contents->GetNativeView();
   view->SetBounds(gfx::Rect(0, 0, 400, 400));