So one can modify its properties without creating a new object. See https://github.com/WICG/mediasession/issues/116
https://codereview.chromium.org/2584703002
The following revision refers to this bug: https://chromium.googlesource.com/chromium/src.git/+/5c2e35fce0858601ae0f45a12b43f4733c384346 commit 5c2e35fce0858601ae0f45a12b43f4733c384346 Author: mlamouri <mlamouri@chromium.org> Date: Fri Dec 16 22:05:38 2016 Media Session API: make MediaMetadata mutable. Spec discussion: https://github.com/WICG/mediasession/issues/116 BUG= 674710 R=zqzhang@chromium.org Review-Url: https://codereview.chromium.org/2584703002 Cr-Commit-Position: refs/heads/master@{#439207} [add] https://crrev.com/5c2e35fce0858601ae0f45a12b43f4733c384346/third_party/WebKit/LayoutTests/media/mediasession/mediasession.html [modify] https://crrev.com/5c2e35fce0858601ae0f45a12b43f4733c384346/third_party/WebKit/LayoutTests/media/mediasession/mediasessionmetadata.html [add] https://crrev.com/5c2e35fce0858601ae0f45a12b43f4733c384346/third_party/WebKit/LayoutTests/media/mediasession/mojo/metadata-async.html [add] https://crrev.com/5c2e35fce0858601ae0f45a12b43f4733c384346/third_party/WebKit/LayoutTests/media/mediasession/mojo/metadata-session-link.html [modify] https://crrev.com/5c2e35fce0858601ae0f45a12b43f4733c384346/third_party/WebKit/LayoutTests/media/mediasession/mojo/resources/utils.js [modify] https://crrev.com/5c2e35fce0858601ae0f45a12b43f4733c384346/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt [modify] https://crrev.com/5c2e35fce0858601ae0f45a12b43f4733c384346/third_party/WebKit/Source/modules/mediasession/MediaMetadata.cpp [modify] https://crrev.com/5c2e35fce0858601ae0f45a12b43f4733c384346/third_party/WebKit/Source/modules/mediasession/MediaMetadata.h [modify] https://crrev.com/5c2e35fce0858601ae0f45a12b43f4733c384346/third_party/WebKit/Source/modules/mediasession/MediaMetadata.idl [modify] https://crrev.com/5c2e35fce0858601ae0f45a12b43f4733c384346/third_party/WebKit/Source/modules/mediasession/MediaSession.cpp [modify] https://crrev.com/5c2e35fce0858601ae0f45a12b43f4733c384346/third_party/WebKit/Source/modules/mediasession/MediaSession.h
Comment 1 by mlamouri@chromium.org
, Dec 15 2016