overscroll: Take a screenshot at more appropriate times.

content/renderer/render_widget.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_widget.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 952 matching lines @@
   }
 
   // Suppress updating when we are hidden.
   if (is_hidden_ || size_.IsEmpty()) {
     paint_aggregator_.ClearPendingUpdate();
     needs_repainting_on_restore_ = true;
     TRACE_EVENT0("renderer", "EarlyOut_NotVisible");
     return;
   }
 
+  if (is_swapped_out_)

[Charlie Reis, 2013/01/09 00:49:23]

Or just move this up into the is_hidden_ check above.  But then we're back to
patch 4.

+    return;
+
   if (is_accelerated_compositing_active_)
     using_asynchronous_swapbuffers_ = SupportsAsynchronousSwapBuffers();
 
   // Tracking of frame rate jitter
   base::TimeTicks frame_begin_ticks = base::TimeTicks::Now();
   webwidget_->instrumentBeginFrame();
   AnimateIfNeeded();
 
   // Layout may generate more invalidation.  It may also enable the
   // GPU acceleration, so make sure to run layout before we send the
@@ skipping 1059 matching lines @@
 
 bool RenderWidget::WebWidgetHandlesCompositorScheduling() const {
   return false;
 }
 
 bool RenderWidget::HasTouchEventHandlersAt(const gfx::Point& point) const {
   return true;
 }
 
 }  // namespace content