Fix cursor positioning regression from r201136. GetCursorPos() shouldn't assume

ui/gfx/render_text_unittest.cc

Index: ui/gfx/render_text_unittest.cc
===================================================================
--- ui/gfx/render_text_unittest.cc	(revision 201137)
+++ ui/gfx/render_text_unittest.cc	(working copy)
@@ -285,9 +285,8 @@
   }
 
   // GetGlyphBounds() should yield the entire string bounds for text index 0.
-  int height = 0;
   ui::Range bounds;
-  render_text->GetGlyphBounds(0U, &bounds, &height);
+  render_text->GetGlyphBounds(0U, &bounds);
   EXPECT_EQ(render_text->GetStringSize().width(),
             static_cast<int>(bounds.length()));