Fix animationTimeline's node description display
Fix animationTimeline's node description display

R=68542faf32f0a558a873c0f094ca9bedb2744bff@chromium.org

Fixed:1277928
Change-Id: Ife2ab9b94511e416b96a2b5280a9a2c370a033fd
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3320251
Auto-Submit: Yang Guo <1cf0af8245a3a17a632a2c73531392b0f9761c76@chromium.org>
Reviewed-by: Changhao Han <68542faf32f0a558a873c0f094ca9bedb2744bff@chromium.org>
Commit-Queue: Changhao Han <68542faf32f0a558a873c0f094ca9bedb2744bff@chromium.org>

ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend