gpu: Avoid flinging beyond content edge

content/renderer/gpu/input_handler_proxy.h

Index: content/renderer/gpu/input_handler_proxy.h
diff --git a/content/renderer/gpu/input_handler_proxy.h b/content/renderer/gpu/input_handler_proxy.h
index 5917731ffef5a77f916a788fe9beb90e822fc0c8..326aa868a525eaf201be5831b7d5065a7dcbfdca 100644
--- a/content/renderer/gpu/input_handler_proxy.h
+++ b/content/renderer/gpu/input_handler_proxy.h
@@ -87,6 +87,9 @@ class CONTENT_EXPORT InputHandlerProxy
   // conservative in the sense that we might not be actually flinging when it is
   // true.
   bool fling_may_be_active_on_main_thread_;
+  // The axes on which the current fling has overshot the bounds of the content.
+  bool fling_overscrolled_horizontally_;
+  bool fling_overscrolled_vertically_;
 
   DISALLOW_COPY_AND_ASSIGN(InputHandlerProxy);
 };