From c65b4d03c76da607b6b678c4a46baa75ca0cf7b3 Mon Sep 17 00:00:00 2001
From: Stephan Hartmann <stha09@googlemail.com>
Date: Wed, 27 May 2020 18:46:40 +0000
Subject: [PATCH] GCC: make base::FilePath move assignment operator noexcept

The move assignment operator in PaintPreviewClient::PaintPreviewData is
noexcept. Because this class has a member of type base::FilePath, the
move assignment operator of base::FilePath must be noexcept too.

Otherwise GCC fails like this:

../../components/paint_preview/browser/paint_preview_client.cc:107:1:

error: function 'paint_preview::PaintPreviewClient::PaintPreviewData&
paint_preview::PaintPreviewClient::PaintPreviewData::operator=
(paint_preview::PaintPreviewClient::PaintPreviewData&&)' defaulted on
its redeclaration with an exception-specification that differs from
the implicit exception-specification ''
  107 | PaintPreviewClient::PaintPreviewData::operator=(
      | ^~~~~~~~~~~~~~~~~~

Bug: 819294
Change-Id: I87b88a81e8af6b7e61f0d1a8c8444fd6707e50d2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2218168
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#772348}
---

diff --git a/base/files/file_path.cc b/base/files/file_path.cc
index 6dc6854..56c02d2b 100644
--- a/base/files/file_path.cc
+++ b/base/files/file_path.cc
@@ -186,7 +186,7 @@
 
 FilePath& FilePath::operator=(const FilePath& that) = default;
 
-FilePath& FilePath::operator=(FilePath&& that) = default;
+FilePath& FilePath::operator=(FilePath&& that) noexcept = default;
 
 bool FilePath::operator==(const FilePath& that) const {
 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
diff --git a/base/files/file_path.h b/base/files/file_path.h
index 4e23f71a..2160fda 100644
--- a/base/files/file_path.h
+++ b/base/files/file_path.h
@@ -193,7 +193,7 @@
   FilePath(FilePath&& that) noexcept;
   // Replaces the contents with those of |that|, which is left in valid but
   // unspecified state.
-  FilePath& operator=(FilePath&& that);
+  FilePath& operator=(FilePath&& that) noexcept;
 
   bool operator==(const FilePath& that) const;