Move unique name generation and tracking into //content.

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 291 matching lines @@
 void WebView::willEnterModalLoop() {
   pageSuspenderStack().push_back(WTF::makeUnique<ScopedPageSuspender>());
 }
 
 void WebView::didExitModalLoop() {
   DCHECK(pageSuspenderStack().size());
   pageSuspenderStack().pop_back();
 }
 
 void WebViewImpl::setMainFrame(WebFrame* frame) {
-  frame->toImplBase()->initializeCoreFrame(&page()->frameHost(), 0, nullAtom,
-                                           nullAtom);
+  frame->toImplBase()->initializeCoreFrame(&page()->frameHost(), 0, nullAtom);
 }
 
 void WebViewImpl::setCredentialManagerClient(
     WebCredentialManagerClient* webCredentialManagerClient) {
   DCHECK(m_page);
   provideCredentialManagerClientTo(
       *m_page, new CredentialManagerClient(webCredentialManagerClient));
 }
 
 void WebViewImpl::setPrerendererClient(
@@ skipping 3842 matching lines @@
   if (focusedFrame->localFrameRoot() != mainFrameImpl()->frame())
     return nullptr;
   return focusedFrame;
 }
 
 LocalFrame* WebViewImpl::focusedLocalFrameAvailableForIme() const {
   return m_imeAcceptEvents ? focusedLocalFrameInWidget() : nullptr;
 }
 
 }  // namespace blink