Move ContentsSize and HasVisibleContent methods from WebFrame to WebLocalFrame.

third_party/WebKit/Source/web/WebViewImpl.cpp

Index: third_party/WebKit/Source/web/WebViewImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebViewImpl.cpp b/third_party/WebKit/Source/web/WebViewImpl.cpp
index f24ac8821c26da25376655bda05f07160e962be2..fc5de7429d0677fcd4c9f4e0b6b1c5e506219c68 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.cpp
+++ b/third_party/WebKit/Source/web/WebViewImpl.cpp
@@ -1288,14 +1288,13 @@ WebRect WebViewImpl::WidenRectWithinPageBounds(const WebRect& source,
                                                int target_margin,
                                                int minimum_margin) {
   WebSize max_size;
-  if (MainFrame())
-    max_size = MainFrame()->ContentsSize();
   IntSize scroll_offset;
   if (MainFrame()) {
     // TODO(lukasza): https://crbug.com/734209: The DCHECK below holds now, but
     // only because all of the callers don't support OOPIFs and exit early if
     // the main frame is not local.
     DCHECK(MainFrame()->IsWebLocalFrame());
+    max_size = MainFrame()->ToWebLocalFrame()->ContentsSize();
     scroll_offset = MainFrame()->ToWebLocalFrame()->GetScrollOffset();
   }
   int left_margin = target_margin;