[chromedriver] Make GetElementLocationInView return the top-left coordinate rather than the center

chrome/test/chromedriver/element_util.h

Index: chrome/test/chromedriver/element_util.h
diff --git a/chrome/test/chromedriver/element_util.h b/chrome/test/chromedriver/element_util.h
index 142fd646c7801a11b24b556ee5d0c3436fcf54ab..a1a0813846d3966ea1d2889ee89e484c3140122a 100644
--- a/chrome/test/chromedriver/element_util.h
+++ b/chrome/test/chromedriver/element_util.h
@@ -127,6 +127,11 @@ Status ToggleOptionElement(
     WebView* web_view,
     const std::string& element_id);
 
+// |offset| is an optional offset from the top-left of the first ClientRect
+// that is returned by the element's getClientRects() function.
+// If |offset| is null, the |location| returned will be the center of the
+// ClientRect. If it is non-null, |location| will be offset by the specified
+// value.
 Status ScrollElementIntoView(
     Session* session,
     WebView* web_view,