ui: Prefer +/- operators to apply offsets.

ui/gfx/pango_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/pango_util.h"
 
 #include <cairo/cairo.h>
 #include <fontconfig/fontconfig.h>
 #include <pango/pango.h>
 #include <pango/pangocairo.h>
@@ skipping 150 matching lines @@
   pango_layout_set_height(layout, bounds.height() * PANGO_SCALE);
 
   cairo_save(cr);
   cairo_rectangle(cr, clip.x(), clip.y(), clip.width(), clip.height());
   cairo_clip(cr);
 
   int width = 0, height = 0;
   pango_layout_get_pixel_size(layout, &width, &height);
   Rect text_rect(bounds.x(), bounds.y(), width, height);
   // Vertically center |text_rect| in |bounds|.
-  text_rect.Offset(0, (bounds.height() - text_rect.height()) / 2);
+  text_rect += gfx::Vector2d(0, (bounds.height() - text_rect.height()) / 2);
 
   DrawPangoLayout(cr, layout, font, bounds, text_rect,
                   text_color, text_direction, flags);
 
   cairo_restore(cr);
   g_object_unref(layout);
 }
 
 // Pass a width greater than 0 to force wrapping and eliding.
 static void SetupPangoLayoutWithoutFont(
@@ skipping 225 matching lines @@
 
   if (i == desc_to_metrics->end()) {
     PangoFontMetrics* metrics = pango_context_get_metrics(context, desc, NULL);
     desc_to_metrics->insert(std::make_pair(desc_hash, metrics));
     return metrics;
   }
   return i->second;
 }
 
 }  // namespace gfx