Fixing GestureNav on HDPI displays - merge into M38.

content/browser/web_contents/aura/overscroll_navigation_overlay.cc

Index: content/browser/web_contents/aura/overscroll_navigation_overlay.cc
diff --git a/content/browser/web_contents/aura/overscroll_navigation_overlay.cc b/content/browser/web_contents/aura/overscroll_navigation_overlay.cc
index b478c60d070b0af782c2b19830763987f8afd032..530028b6721af7685fab55f4293e12554d80cd74 100644
--- a/content/browser/web_contents/aura/overscroll_navigation_overlay.cc
+++ b/content/browser/web_contents/aura/overscroll_navigation_overlay.cc
@@ -197,8 +197,7 @@ ui::Layer* OverscrollNavigationOverlay::CreateSlideLayer(int offset) {
   gfx::Image image;
   if (entry && entry->screenshot().get()) {
     std::vector<gfx::ImagePNGRep> image_reps;
-    image_reps.push_back(gfx::ImagePNGRep(entry->screenshot(),
-        ui::GetScaleFactorForNativeView(window_.get())));
+    image_reps.push_back(gfx::ImagePNGRep(entry->screenshot(), 1.0f));
     image = gfx::Image(image_reps);
   }
   if (!layer_delegate_)