Bug 972227 - [System] change the iframe background color from white to black
Bug#982491 Group apps in activities chains in the same process a=fabrice
Merge pull request #17618 from sprd-ffos/bug982491-v1.3t

Bug#982491 Group apps in activities chains in the same process a=fabrice
Bug#982491 Group apps in activities chains in the same process a=fabrice, check whether detail.extra was null
Merge pull request #17625 from sprd-ffos/bug982491-v1.3t

Bug#982491 Group apps in activities chains in the same process a=fabrice...
Merge pull request #17565 from dominickuo/v1.3t-bug-972227

Bug 972227 - [System] change the iframe background color from white to black