Remove a bunch of provisionalDataSource() usage.

components/html_viewer/layout_test_content_handler_impl.cc

 // Copyright 2015 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 "components/html_viewer/layout_test_content_handler_impl.h"
 
 #include "base/bind.h"
 #include "components/html_viewer/html_document_application_delegate.h"
 #include "components/html_viewer/html_widget.h"
 #include "components/html_viewer/web_test_delegate_impl.h"
 #include "components/test_runner/web_frame_test_proxy.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebTestingSupport.h"
 #include "third_party/WebKit/public/web/WebView.h"
 
 namespace html_viewer {
 
 class TestHTMLFrame : public HTMLFrame {
  public:
   explicit TestHTMLFrame(HTMLFrame::CreateParams* params)
       : HTMLFrame(params), test_interfaces_(nullptr) {}
 
   void set_test_interfaces(test_runner::WebTestInterfaces* test_interfaces) {
     test_interfaces_ = test_interfaces;
   }
 
+  // WebFrameTestProxy expects to be able to get a WebLocalFrame from
+  // Base::GetWebFrame().
+  blink::WebLocalFrame* GetWebFrame() {
+    return web_frame()->isWebLocalFrame() ?
+        web_frame()->toWebLocalFrame() : NULL;
+  }
+
  protected:
   ~TestHTMLFrame() override {}
 
  private:
   // blink::WebFrameClient::
   void didClearWindowObject(blink::WebLocalFrame* frame) override {
     HTMLFrame::didClearWindowObject(frame);
     blink::WebTestingSupport::injectInternalsObject(frame);
     DCHECK(test_interfaces_);
     test_interfaces_->BindTo(frame);
@@ skipping 56 matching lines @@
   proxy->set_base_proxy(web_widget_proxy_);
   test_delegate_->set_test_proxy(web_widget_proxy_);
   test_interfaces_->SetWebView(web_widget_proxy_->web_view(),
                                web_widget_proxy_);
   web_widget_proxy_->set_widget(web_widget_proxy_->web_view());
   test_interfaces_->BindTo(web_widget_proxy_->web_view()->mainFrame());
   return proxy;
 }
 
 }  // namespace html_viewer