Bug 1301426 part 18 - test case 17; r=jwwang Case: invoke load() on an element should reject pending promises in order. Expected result: the pending promises are rejected in order. MozReview-Commit-ID: AJMX7uLTEN0

Bug 1301426 part 17 - test case 16; r=jwwang Case: invoke load() on an element should resolve pending promises in order. Expected result: the pending promises are resolved in order. MozReview-Commit-ID: 1FSdBd3zwrB

Bug 1301426 part 16 - test case 15; r=jwwang Case: step1: create an element with its paused member to be fause and networkState to be NETWORK_NO_SOURCE. stpe2: invoke load() on the element and the load() rejects the pending promise. Expected result: reject the pending promise. MozReview-Commit-ID: 34Hj9Xyuq8H

Bug 1301426 part 15 - test case 14; r=jwwang Case: step1: create an element with its paused member to be fause and networkState to be NETWORK_EMPTY. stpe2: invoke load() on the element and the load() leaves the promise pending. Expected result: the pending promise should finally be resolved. MozReview-Commit-ID: CbUs1barMSP

Bug 1301426 part 14 - test case 13; r=jwwang Case: re-invoke the load() on an element which had dispatched a task to resolve a promise. Expected result: the already dispatched promise should still be resolved. MozReview-Commit-ID: CGthPmPeaif

Bug 1301426 part 13 - test case 12; r=jwwang Case:: invoke pause() and then play() on an element that is already playing. Expected result: resolve the promise. MozReview-Commit-ID: DaYzxTgEWwL

Bug 1301426 part 12 - test case 11; r=jwwang Case: change src of an element with pending promises. Expected result: reject all the pending promises. MozReview-Commit-ID: 6iPl5iLOgKX

Bug 1301426 part 11 - test case 10; r=jwwang Case: invoke load() on an element with pending promises. Expected result: reject all the pending promises. MozReview-Commit-ID: Kg5FHAmhF4L

Bug 1301426 part 10 - test case 9; r=jwwang Case: invlke play() and the pause() on an element that deoen't have enough data to play. Expected result: reject the promise. MozReview-Commit-ID: 8x5dFhhbTVJ

Bug 1301426 part 9 - test case 8; r=jwwang Case: invlke play() and the pause() on an element that already has enough data to play. Expected result: resolve the promise. MozReview-Commit-ID: BdbYHf7moyH

Bug 1301426 part 8 - test case 7; r=jwwang Case: invoke play() on an element which had its source changed (to a invalid source) after suffering from an error. Expected result: reject the promise. MozReview-Commit-ID: 3EDf0TpTwYb

Bug 1301426 part 7 - test case 6; r=jwwang Case: invoke play() on an element which had its source changed (to a valid source) after suffering from an error. Expected result: resolve the promise. MozReview-Commit-ID: 9ZxT7TRVR6v

Bug 1301426 part 6 - test case 5; r=jwwang Case: invoke play() on an element with MEDIA_ERR_SRC_NOT_SUPPORTED has been set. Expected result: reject the promise. MozReview-Commit-ID: Bp4Ng6gKUa1

Bug 1301426 part 5 - test case 4; r=jwwang Case: invoke play() on an element with an unsupported content. Expected result: reject the promis.e MozReview-Commit-ID: 1zZc0PhBmAD

Bug 1301426 part 4 - test case 3; r=jwwang Case: invoke play() on an element that is already playing. Expected result: resolve the promise. MozReview-Commit-ID: 83IbJNF7Rzd

Bug 1301426 part 3 - test case 2; r=jwwang Case: invoke play() on an element that has enough data Expected result: resolve the promise MozReview-Commit-ID: JAloJxN933Z

Bug 1301426 part 2 - test case 1; r=jwwang Case: invoke play() on an element that doesn't have enough data Expected result: resolve the promise MozReview-Commit-ID: 7bUs8cy5Fkv

Bug 1301426 part 1 - implement helper functions; r=jwwang MozReview-Commit-ID: DL16hNeT8r2

Bug 1317069 - Fix ESLint in new console frontend; r=ntim MozReview-Commit-ID: 7MgHbRxnU1V

Bug 1244768 part 10 - enable web-platform test; r=jwwang MozReview-Commit-ID: CQShLVRgrHb