CastActivityManager: Do not make DoLaunchSessionParams' move constructor noexcept

This fixes the GCC build:

    ../../chrome/browser/media/router/providers/cast/cast_activity_manager.cc:806:1: error: function ‘media_router::CastActivityManager::DoLaunchSessionParams::DoLaunchSessionParams(media_router::CastActivityManager::DoLaunchSessionParams&&)’ defaulted on its redeclaration with an exception-specification that differs from the implicit exception-specification ‘’
     CastActivityManager::DoLaunchSessionParams::DoLaunchSessionParams(
     ^~~~~~~~~~~~~~~~~~~

With GCC, having that noexcept marker requires all members to be marked with
noexcept themselves, and MediaRoute, CastMediaSource and url::Origin need
the right annotations. Just making DoLaunchSessionParams not noexcept is the
least intrusive solution for now.

clang is fine because we pass -fno-exceptions and it disables the same error
there, while GCC continues to raise it (bug 843143 and its corresponding CL
have a longer discussion on this issue).

Bug: 819294
Change-Id: Ia3a5fb60b5e74e68bd35cfa50e2fcc728b64e5eb
Reviewed-on: https://chromium-review.googlesource.com/c/1469942
Commit-Queue: mark a. foltz <mfoltz@chromium.org>
Auto-Submit: Raphael Kubo da Costa <raphael.kubo.da.costa@intel.com>
Reviewed-by: mark a. foltz <mfoltz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#631962}
2 files changed