Becky Siegel 55a1eec37d Fix jumping scroll position when diff view loads
Previously, there was an issue where if you started scrolling on a diff
view page before everything was loaded, the page would jump back to the
top after loading finished.

This change temporarily adjusts scroll behavior when scrolling is
detected mid-diff load. The scroll behavior is then restored after
loading completes.

Bug: Issue 4411
Change-Id: I8175d433632fd8710f1353f7ba5635b826151ce0
2016-10-06 07:57:41 -07:00
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