gn/linux: warnings as errors, turn on Wextra

content/common/cursors/webcursor_aurax11.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 "content/common/cursors/webcursor.h"
 
 #include <X11/cursorfont.h>
 #include <X11/Xcursor/Xcursor.h>
 #include <X11/Xlib.h>
 
 #include "base/logging.h"
 #include "third_party/WebKit/public/platform/WebCursorInfo.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/base/cursor/cursor_loader_x11.h"
 #include "ui/base/cursor/cursor_util.h"
 #include "ui/base/x/x11_util.h"
 
 namespace content {
 
-const ui::PlatformCursor WebCursor::GetPlatformCursor() {
+ui::PlatformCursor WebCursor::GetPlatformCursor() {
   if (platform_cursor_)
     return platform_cursor_;
 
   if (custom_data_.size() == 0)
     return 0;
 
   SkBitmap bitmap;
   bitmap.allocN32Pixels(custom_size_.width(), custom_size_.height());
   memcpy(bitmap.getAddr32(0, 0), custom_data_.data(), custom_data_.size());
   gfx::Point hotspot = hotspot_;
@@ skipping 45 matching lines @@
   if (platform_cursor_)
     ui::UnrefCustomXCursor(platform_cursor_);
   platform_cursor_ = other.platform_cursor_;
   if (platform_cursor_)
     ui::RefCustomXCursor(platform_cursor_);
 
   device_scale_factor_ = other.device_scale_factor_;
 }
 
 }  // namespace content