Add GetScrollOffset function to PPB_View

content/renderer/pepper/pepper_plugin_instance_impl.cc

Index: content/renderer/pepper/pepper_plugin_instance_impl.cc
diff --git a/content/renderer/pepper/pepper_plugin_instance_impl.cc b/content/renderer/pepper/pepper_plugin_instance_impl.cc
index 0811eba1f5d5c7cb0426baa15a1a18be97af67d4..4853e386d6dc1f0a311a754d3e96984e9b06415f 100644
--- a/content/renderer/pepper/pepper_plugin_instance_impl.cc
+++ b/content/renderer/pepper/pepper_plugin_instance_impl.cc
@@ -1204,6 +1204,18 @@ void PepperPluginInstanceImpl::ViewChanged(
   view_data_.css_scale =
       container_->pageZoomFactor() * container_->pageScaleFactor();
 
+  // Only set the scroll offset if the plugin is visible.
+  if (!view_data_.is_page_visible ||
+      view_data_.clip_rect.size.width == 0 ||
+      view_data_.clip_rect.size.height == 0) {
+    view_data_.scroll_offset = PP_MakePoint(0, 0);
+  } else {
+    gfx::Size scroll_offset =
+        container_->element().document().frame()->scrollOffset();
+    view_data_.scroll_offset = PP_MakePoint(scroll_offset.width(),
+                                            scroll_offset.height());
+  }
+
   if (desired_fullscreen_state_ || view_data_.is_fullscreen) {
     WebElement element = container_->element();
     WebDocument document = element.document();