overscroll: Take a screenshot at more appropriate times.

content/browser/web_contents/navigation_controller_impl.cc

Index: content/browser/web_contents/navigation_controller_impl.cc
diff --git a/content/browser/web_contents/navigation_controller_impl.cc b/content/browser/web_contents/navigation_controller_impl.cc
index bd6971646b8d428103ed5fcb13eb1b9d226ebf1e..75c130757c38b7cc35daef536ea1aa7c0137f08c 100644
--- a/content/browser/web_contents/navigation_controller_impl.cc
+++ b/content/browser/web_contents/navigation_controller_impl.cc
@@ -752,12 +752,6 @@ void NavigationControllerImpl::DocumentLoadedInFrame() {
 bool NavigationControllerImpl::RendererDidNavigate(
     const ViewHostMsg_FrameNavigate_Params& params,
     LoadCommittedDetails* details) {
-  // When navigating away from the current page, take a screenshot of it in the
-  // current state so that it can be used during an overscroll-navigation
-  // gesture.
-  if (details->is_main_frame)
-    TakeScreenshot();
-
   // Save the previous state before we clobber it.
   if (GetLastCommittedEntry()) {
     details->previous_url = GetLastCommittedEntry()->GetURL();