Clean up Chrome OS WARNING spam

chrome/browser/chromeos/login/ui/webui_login_view.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 "chrome/browser/chromeos/login/ui/webui_login_view.h"
 
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray.h"
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 441 matching lines @@
     return;
 
   GetWebUI()->CallJavascriptFunction("login.GaiaSigninScreen.onFrameError",
                                      base::FundamentalValue(-error_code),
                                      base::StringValue(validated_url.spec()));
 }
 
 void WebUILoginView::OnLoginPromptVisible() {
   // If we're hidden than will generate this signal once we're shown.
   if (is_hidden_ || webui_visible_) {
-    LOG(WARNING) << "Login WebUI >> not emitting signal, hidden: "
-                 << is_hidden_;
+    VLOG(1) << "Login WebUI >> not emitting signal, hidden: " << is_hidden_;
     return;
   }
   TRACE_EVENT0("chromeos", "WebUILoginView::OnLoginPromoptVisible");
   if (should_emit_login_prompt_visible_) {
-    LOG(WARNING) << "Login WebUI >> login-prompt-visible";
+    VLOG(1) << "Login WebUI >> login-prompt-visible";
     chromeos::DBusThreadManager::Get()->GetSessionManagerClient()->
         EmitLoginPromptVisible();
   }
 
   webui_visible_ = true;
 }
 
 void WebUILoginView::ReturnFocus(bool reverse) {
   // Return the focus to the web contents.
   webui_login_->web_contents()->FocusThroughTabTraversal(reverse);
   GetWidget()->Activate();
 }
 
 }  // namespace chromeos