Fix gendered language and fix grammar.

third_party/WebKit/LayoutTests/fast/events/autoscroll-nonscrollable-iframe-in-scrollable-div-expected.txt

Index: third_party/WebKit/LayoutTests/fast/events/autoscroll-nonscrollable-iframe-in-scrollable-div-expected.txt
diff --git a/third_party/WebKit/LayoutTests/fast/events/autoscroll-nonscrollable-iframe-in-scrollable-div-expected.txt b/third_party/WebKit/LayoutTests/fast/events/autoscroll-nonscrollable-iframe-in-scrollable-div-expected.txt
index ad399d4a287de35a53da25e7011e24b81b6bcbfc..87ceb8599f99ac67d889145b6752be06ef415a1b 100644
--- a/third_party/WebKit/LayoutTests/fast/events/autoscroll-nonscrollable-iframe-in-scrollable-div-expected.txt
+++ b/third_party/WebKit/LayoutTests/fast/events/autoscroll-nonscrollable-iframe-in-scrollable-div-expected.txt
@@ -1,6 +1,6 @@
 
 rdar://problem/6166435 Inspector doesn't auto scroll when selecting text (20451) 
 To do the test manually you have to try triggering the autoscroll by starting the dragging from within the blue iframe. If the autoscroll occurs the text has passed, if the autoscroll isn't working, the test has failed
-nb: Knowing that the iframe document has a overflow: hidden on his body but the whole iframe is embedded in scrollable div, the scrollable div have to be able to trigger the autoscroll
+nb: Knowing that the iframe document has an overflow: hidden on its body but the whole iframe is embedded in a scrollable div, the scrollable div has to be able to trigger the autoscroll
 Though you should be able to write some long text in the input and to trigger the autoscroll within the input.
 PASSED : the autoscroll has worked !