Delegate root layer scroll offset to android_webview.

android_webview/browser/in_process_view_renderer.cc

 // Copyright 2013 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 "android_webview/browser/in_process_view_renderer.h"
 
 #include <android/bitmap.h>
 
 #include "android_webview/public/browser/draw_gl.h"
 #include "android_webview/public/browser/draw_sw.h"
@@ skipping 539 matching lines @@
 
 void InProcessViewRenderer::SetContinuousInvalidate(bool invalidate) {
   if (continuous_invalidate_ == invalidate)
     return;
 
   continuous_invalidate_ = invalidate;
   // TODO(boliu): Handle if not attached to window case.
   EnsureContinuousInvalidation();
 }
 
+void InProcessViewRenderer::SetTotalRootLayerScrollOffset(
+    gfx::Vector2dF new_value) {
+  // TODO(mkosiba): Plumb this all the way through to the view.
+  root_layer_scroll_offset_ = new_value;
+}
+
+gfx::Vector2dF InProcessViewRenderer::GetTotalRootLayerScrollOffset() {
+  return root_layer_scroll_offset_;
+}
+
 void InProcessViewRenderer::Invalidate() {
   continuous_invalidate_task_pending_ = false;
   if (continuous_invalidate_)
     client_->Invalidate();
 }
 
 void InProcessViewRenderer::EnsureContinuousInvalidation() {
   if (continuous_invalidate_ && !continuous_invalidate_task_pending_) {
     base::MessageLoop::current()->PostTask(FROM_HERE,
         base::Bind(&InProcessViewRenderer::Invalidate,
                    weak_factory_.GetWeakPtr()));
     continuous_invalidate_task_pending_ = true;
   }
 }
 
 bool InProcessViewRenderer::RenderSW(SkCanvas* canvas) {
   // TODO(joth): BrowserViewRendererImpl had a bunch of logic for dpi and page
   // scale here. Determine what if any needs bringing over to this class.
   return CompositeSW(canvas);
 }
 
 bool InProcessViewRenderer::CompositeSW(SkCanvas* canvas) {
   return compositor_ && compositor_->DemandDrawSw(canvas);
 }
 
 }  // namespace android_webview