Auto merge of #7928 - mrobinson:layer-tree-fix, r=pcwalton

Add the dump-layer-tree option to the -Z help text

I accidentally omitted this when I added the dump-layer-tree option
initially.

Fixes #7926.

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This commit is contained in:
bors-servo 2015-10-08 11:23:18 -06:00
commit a8ad990c6d

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@ -309,6 +309,7 @@ pub fn print_debug_usage(app: &str) -> ! {
print_option("dump-display-list", "Print the display list after each layout.");
print_option("dump-display-list-json", "Print the display list in JSON form.");
print_option("dump-display-list-optimized", "Print optimized display list (at paint time).");
print_option("dump-layer-tree", "Print the layer tree whenever it changes.");
print_option("relayout-event", "Print notifications when there is a relayout.");
print_option("profile-tasks", "Instrument each task, writing the output to a file.");
print_option("show-compositor-borders", "Paint borders along layer and tile boundaries.");