Force reset of RenderViewImpl zoom level.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 3ac2863ba6f89e37d5876d64acf65d9d85f389ed..53abbcb4f01c64d0f152560067cebff7629bb3a6 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -3374,8 +3374,13 @@ void RenderFrameImpl::SendDidCommitProvisionalLoad(blink::WebFrame* frame) {
       // Reset the zoom levels for plugins.
       render_view_->webview()->setZoomLevel(0);
     } else {
-      if (host_zoom != render_view_->host_zoom_levels_.end())
+      if (host_zoom != render_view_->host_zoom_levels_.end()) {
         render_view_->webview()->setZoomLevel(host_zoom->second);
+      } else {
+        // If the url was not found, we need to reset in case we are re-using
+        // an existing RenderViewImpl, e.g. to show a network error page.
+        render_view_->webview()->setZoomLevel(0);
+      }
     }
 
     if (host_zoom != render_view_->host_zoom_levels_.end()) {