gn/linux: warnings as errors, turn on Wextra

content/common/cursors/webcursor.h

 // 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.
 
 #ifndef CONTENT_COMMON_CURSORS_WEBCURSOR_H_
 #define CONTENT_COMMON_CURSORS_WEBCURSOR_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 86 matching lines @@
   gfx::NativeCursor GetNativeCursor();
 
 #if defined(OS_WIN)
   // Initialize this from the given Windows cursor. The caller must ensure that
   // the HCURSOR remains valid by not invoking the DestroyCursor/DestroyIcon
   // APIs on it.
   void InitFromExternalCursor(HCURSOR handle);
 #endif
 
 #if defined(USE_AURA)
-  const ui::PlatformCursor GetPlatformCursor();
+  ui::PlatformCursor GetPlatformCursor();
 
   // Updates |device_scale_factor_| and |rotation_| based on |display|.
   void SetDisplayInfo(const gfx::Display& display);
 
 #elif defined(OS_WIN)
   // Returns a HCURSOR representing the current WebCursor instance.
   // The ownership of the HCURSOR (does not apply to external cursors) remains
   // with the WebCursor instance.
   HCURSOR GetCursor(HINSTANCE module_handle);
 
@@ skipping 60 matching lines @@
 #endif
 
 #if defined(USE_OZONE)
   gfx::Display::Rotation rotation_;
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_CURSORS_WEBCURSOR_H_