Move GetDocument method from WebFrame to WebLocalFrame.

third_party/WebKit/Source/web/tests/WebDocumentSubresourceFilterTest.cpp

Index: third_party/WebKit/Source/web/tests/WebDocumentSubresourceFilterTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/WebDocumentSubresourceFilterTest.cpp b/third_party/WebKit/Source/web/tests/WebDocumentSubresourceFilterTest.cpp
index 82b8b8dfe34987092e22bab969090cc33c15399e..f3e20b06db31f287d547b18968074d7731bbfb37 100644
--- a/third_party/WebKit/Source/web/tests/WebDocumentSubresourceFilterTest.cpp
+++ b/third_party/WebKit/Source/web/tests/WebDocumentSubresourceFilterTest.cpp
@@ -9,6 +9,7 @@
 
 #include "core/dom/Element.h"
 #include "core/frame/FrameTestHelpers.h"
+#include "core/frame/WebLocalFrameBase.h"
 #include "core/html/HTMLImageElement.h"
 #include "platform/testing/URLTestHelpers.h"
 #include "platform/testing/UnitTestHelpers.h"
@@ -106,7 +107,9 @@ class WebDocumentSubresourceFilterTest : public ::testing::Test {
   }
 
   const std::string& BaseURL() const { return base_url_; }
-  WebFrame* MainFrame() { return web_view_helper_.WebView()->MainFrame(); }
+  WebLocalFrameBase* MainFrame() {
+    return web_view_helper_.WebView()->MainFrameImpl();
+  }
   const std::vector<std::string>& QueriedSubresourcePaths() const {
     return client_.SubresourceFilter()->QueriedSubresourcePaths();
   }