Remove redundant WebLocalFrame* parameter from didCreateDocumentElement

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 679773f82aca83ced3397903a82c2e4dd7c899e6..c7e905dafe8b433a1e6afbd69473094bd75be1b1 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -3816,16 +3816,14 @@ void RenderFrameImpl::didClearWindowObject(blink::WebLocalFrame* frame) {
     observer.DidClearWindowObject();
 }
 
-void RenderFrameImpl::didCreateDocumentElement(blink::WebLocalFrame* frame) {
-  DCHECK(!frame_ || frame_ == frame);
-
+void RenderFrameImpl::didCreateDocumentElement() {
   // Notify the browser about non-blank documents loading in the top frame.
-  GURL url = frame->document().url();
+  GURL url = frame_->document().url();
   if (url.is_valid() && url.spec() != url::kAboutBlankURL) {
     // TODO(nasko): Check if webview()->mainFrame() is the same as the
-    // frame->tree()->top().
+    // frame_->tree()->top().
     blink::WebFrame* main_frame = render_view_->webview()->mainFrame();
-    if (frame == main_frame) {
+    if (frame_ == main_frame) {
       // For now, don't remember plugin zoom values.  We don't want to mix them
       // with normal web content (i.e. a fixed layout plugin would usually want
       // them different).
@@ -3838,7 +3836,7 @@ void RenderFrameImpl::didCreateDocumentElement(blink::WebLocalFrame* frame) {
   for (auto& observer : observers_)
     observer.DidCreateDocumentElement();
   for (auto& observer : render_view_->observers())
-    observer.DidCreateDocumentElement(frame);
+    observer.DidCreateDocumentElement(frame_);
 }
 
 void RenderFrameImpl::runScriptsAtDocumentElementAvailable(