Move GetDocument method from WebFrame to WebLocalFrame.

content/shell/test_runner/test_runner_for_specific_view.cc

 // Copyright 2016 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 "content/shell/test_runner/test_runner_for_specific_view.h"
 
 #include <stddef.h>
 #include <limits>
 #include <utility>
 
@@ skipping 280 matching lines @@
 
   CopyImageAtAndCapturePixels(
       web_view(), x, y,
       base::Bind(&TestRunnerForSpecificView::CapturePixelsCallback,
                  weak_factory_.GetWeakPtr(),
                  base::Passed(std::move(persistent_callback))));
 }
 
 void TestRunnerForSpecificView::GetManifestThen(
     v8::Local<v8::Function> callback) {
+  if (!web_view()->MainFrame()->IsWebLocalFrame()) {
+    CHECK(false) << "This function cannot be called if the main frame is not a "
+                    "local frame.";
+  }
+
   v8::UniquePersistent<v8::Function> persistent_callback(
       blink::MainThreadIsolate(), callback);
 
   delegate()->FetchManifest(
-      web_view(), web_view()->MainFrame()->GetDocument().ManifestURL(),
+      web_view(),
+      web_view()->MainFrame()->ToWebLocalFrame()->GetDocument().ManifestURL(),
       base::Bind(&TestRunnerForSpecificView::GetManifestCallback,
                  weak_factory_.GetWeakPtr(),
                  base::Passed(std::move(persistent_callback))));
 }
 
 void TestRunnerForSpecificView::GetManifestCallback(
     v8::UniquePersistent<v8::Function> callback,
     const blink::WebURLResponse& response,
     const std::string& data) {
   PostV8CallbackWithArgs(std::move(callback), 0, nullptr);
@@ skipping 371 matching lines @@
 
 blink::WebView* TestRunnerForSpecificView::web_view() {
   return web_view_test_proxy_base_->web_view();
 }
 
 WebTestDelegate* TestRunnerForSpecificView::delegate() {
   return web_view_test_proxy_base_->delegate();
 }
 
 }  // namespace test_runner