Revert of Require WebLocalFrame to be created with a non-null client

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 2fb7787a75959bbfa30a640ac5b96a2f23265811..9523dbc4a089b87782057af8c1834e5cafadc8e2 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -470,7 +470,7 @@
   blink::BlameContext* frameBlameContext() override;
   blink::WebServiceWorkerProvider* createServiceWorkerProvider() override;
   void didAccessInitialDocument() override;
-  blink::WebLocalFrame* createChildFrame(
+  blink::WebFrame* createChildFrame(
       blink::WebLocalFrame* parent,
       blink::WebTreeScopeType scope,
       const blink::WebString& name,
@@ -480,7 +480,7 @@
   void didChangeOpener(blink::WebFrame* frame) override;
   void frameDetached(blink::WebLocalFrame* frame, DetachType type) override;
   void frameFocused() override;
-  void willCommitProvisionalLoad(blink::WebLocalFrame* frame) override;
+  void willClose(blink::WebFrame* frame) override;
   void didChangeName(const blink::WebString& name,
                      const blink::WebString& unique_name) override;
   void didEnforceInsecureRequestPolicy(