Propagate auto-resize viewport values to OOPIF processes

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 627a0e570cb1c368107bfb95d1ba0099740adb0c..7f4a8b07365c8220cc67f849f887d5a17282e1be 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -2788,10 +2788,32 @@ void WebContentsImpl::ResizeDueToAutoResize(
   if (render_widget_host != GetRenderViewHost()->GetWidget())
     return;
 
+  auto_resize_size_ = new_size;
+
+  // Out-of-process iframe visible viewport sizes usually come from the
+  // top-level RenderWidgetHostView, but when auto-resize is enabled on the
+  // top frame then that size is used instead.
+  for (FrameTreeNode* node : frame_tree_.Nodes()) {
+    if (node->current_frame_host()->is_local_root()) {
+      RenderWidgetHostImpl* host =
+          node->current_frame_host()->GetRenderWidgetHost();
+      if (host != render_widget_host)
+        host->WasResized();
+    }
+  }
+
   if (delegate_)
     delegate_->ResizeDueToAutoResize(this, new_size);
 }
 
+gfx::Size WebContentsImpl::GetAutoResizeSize() {
+  return auto_resize_size_;
+}
+
+void WebContentsImpl::ResetAutoResizeSize() {
+  auto_resize_size_ = gfx::Size();
+}
+
 WebContents* WebContentsImpl::OpenURL(const OpenURLParams& params) {
   if (!delegate_)
     return NULL;