Switch gfx::Range to use uint32_t instead of size_t.

content/browser/renderer_host/render_widget_host_view_mac.mm

 // 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 "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #import <objc/runtime.h>
 #include <OpenGL/gl.h>
 #include <QuartzCore/QuartzCore.h>
 #include <stdint.h>
@@ skipping 1292 matching lines @@
   DCHECK(line_break_point);
   if (range.start() >= bounds.size() || range.is_reversed() || range.is_empty())
     return false;
 
   // We can't check line breaking completely from only rectangle array. Thus we
   // assume the line breaking as the next character's y offset is larger than
   // a threshold. Currently the threshold is determined as minimum y offset plus
   // 75% of maximum height.
   // TODO(nona): Check the threshold is reliable or not.
   // TODO(nona): Bidi support.
-  const size_t loop_end_idx = std::min(bounds.size(), range.end());
+  const size_t loop_end_idx =
+      std::min(bounds.size(), static_cast<size_t>(range.end()));
   int max_height = 0;
   int min_y_offset = std::numeric_limits<int32_t>::max();
   for (size_t idx = range.start(); idx < loop_end_idx; ++idx) {
     max_height = std::max(max_height, bounds[idx].height());
     min_y_offset = std::min(min_y_offset, bounds[idx].y());
   }
   int line_break_threshold = min_y_offset + (max_height * 3 / 4);
   for (size_t idx = range.start(); idx < loop_end_idx; ++idx) {
     if (bounds[idx].y() > line_break_threshold) {
       *line_break_point = idx;
@@ skipping 2120 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end