Fixed bugs with finding line boundaries using IA2 get_textAtOffset and AXPosition::AtStartOfLine.

content/browser/accessibility/browser_accessibility_com_win.h

Index: content/browser/accessibility/browser_accessibility_com_win.h
diff --git a/content/browser/accessibility/browser_accessibility_com_win.h b/content/browser/accessibility/browser_accessibility_com_win.h
index c7794a01ae2adf9dd7b16dd192eb3abadd029e53..b8ce862e28f68d1821cd6f08d693732ed21c0af8 100644
--- a/content/browser/accessibility/browser_accessibility_com_win.h
+++ b/content/browser/accessibility/browser_accessibility_com_win.h
@@ -876,8 +876,7 @@ class __declspec(uuid("562072fe-3390-43b1-9e2c-dd4118f5ac79"))
   // Search forwards (direction == 1) or backwards (direction == -1)
   // from the given offset until the given boundary is found, and
   // return the offset of that boundary.
-  LONG FindBoundary(const base::string16& text,
-                    IA2TextBoundaryType ia2_boundary,
+  LONG FindBoundary(IA2TextBoundaryType ia2_boundary,
                     LONG start_offset,
                     ui::TextBoundaryDirection direction);