Move Get/SetScrollOffset methods from WebFrame to WebLocalFrame.

components/printing/renderer/print_web_view_helper.cc

 // Copyright (c) 2012 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/printing/renderer/print_web_view_helper.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 741 matching lines @@
                               web_print_params_.print_content_area.height);
   print_layout_size.set_height(
       ScaleAndRound(print_layout_size.height(), kPrintingMinimumShrinkFactor));
 
   if (!frame())
     return;
 
   // Backup size and offset if it's a local frame.
   blink::WebView* web_view = frame_.view();
   if (blink::WebFrame* web_frame = web_view->MainFrame()) {
+    // TODO(lukasza, weili): Support restoring scroll offset of a remote main
+    // frame - https://crbug.com/734815.
     if (web_frame->IsWebLocalFrame())
-      prev_scroll_offset_ = web_frame->GetScrollOffset();
+      prev_scroll_offset_ = web_frame->ToWebLocalFrame()->GetScrollOffset();
   }
   prev_view_size_ = web_view->Size();
 
   web_view->Resize(print_layout_size);
 }
 
 void PrepareFrameAndViewForPrint::StartPrinting() {
   blink::WebView* web_view = frame_.view();
   web_view->GetSettings()->SetShouldPrintBackgrounds(should_print_backgrounds_);
   expected_pages_count_ =
@@ skipping 80 matching lines @@
   return on_ready_.Run();  // Can delete |this|.
 }
 
 void PrepareFrameAndViewForPrint::RestoreSize() {
   if (!frame())
     return;
 
   blink::WebView* web_view = frame_.GetFrame()->View();
   web_view->Resize(prev_view_size_);
   if (blink::WebFrame* web_frame = web_view->MainFrame()) {
+    // TODO(lukasza, weili): Support restoring scroll offset of a remote main
+    // frame - https://crbug.com/734815.
     if (web_frame->IsWebLocalFrame())
-      web_frame->SetScrollOffset(prev_scroll_offset_);
+      web_frame->ToWebLocalFrame()->SetScrollOffset(prev_scroll_offset_);
   }
 }
 
 void PrepareFrameAndViewForPrint::FinishPrinting() {
   blink::WebLocalFrame* frame = frame_.GetFrame();
   if (frame) {
     blink::WebView* web_view = frame->View();
     if (is_printing_started_) {
       is_printing_started_ = false;
       if (!owns_web_view_) {
@@ skipping 1503 matching lines @@
       blink::WebConsoleMessage::kLevelWarning, message));
   return false;
 }
 
 void PrintWebViewHelper::ScriptingThrottler::Reset() {
   // Reset counter on successful print.
   count_ = 0;
 }
 
 }  // namespace printing