Mark root as already hydrated after committing

[sebmarkbage]

I pulled this out of #16725.

We currently infer that a root is eligible for hydration if it has no children. The current === null check is just for Flow. A root will never render with no current because it comes into existence as a current with no children and then the first render is an update to that.

This fixes that by setting root.hydrate to false after committing the first time. I also need this commit phase for event replaying anyway.

[sizebot]

Details of bundled changes.

Comparing: ba6bb0f...6acafc3

react-art

File	Filesize Diff	Gzip Diff	Prev Size	Current Size	Prev Gzip	Current Gzip	ENV
react-art.development.js	+0.1%	0.0%	658.71 KB	659.23 KB	143.32 KB	143.39 KB	UMD_DEV
react-art.production.min.js	0.0%	0.0%	102.02 KB	102.02 KB	31.18 KB	31.18 KB	UMD_PROD
react-art.development.js	+0.1%	+0.1%	589.39 KB	589.91 KB	125.87 KB	125.94 KB	NODE_DEV
react-art.production.min.js	0.0%	0.0%	67.02 KB	67.02 KB	20.38 KB	20.38 KB	NODE_PROD
ReactART-dev.js	+0.1%	0.0%	604.8 KB	605.24 KB	125.64 KB	125.7 KB	FB_WWW_DEV
ReactART-prod.js	0.0%	0.0%	226 KB	226 KB	38.54 KB	38.54 KB	FB_WWW_PROD

react-dom

File	Filesize Diff	Gzip Diff	Prev Size	Current Size	Prev Gzip	Current Gzip	ENV
react-dom.profiling.min.js	0.0%	0.0%	115.82 KB	115.83 KB	36.52 KB	36.52 KB	NODE_PROFILING
react-dom-server.browser.development.js	0.0%	0.0%	142.1 KB	142.1 KB	37.12 KB	37.12 KB	UMD_DEV
ReactDOM-dev.js	0.0%	0.0%	946.04 KB	946.48 KB	208.85 KB	208.91 KB	FB_WWW_DEV
react-dom-test-utils.development.js	0.0%	0.0%	57.46 KB	57.46 KB	15.82 KB	15.82 KB	UMD_DEV
react-dom-unstable-fizz.browser.development.js	0.0%	+0.1%	3.78 KB	3.78 KB	1.53 KB	1.53 KB	UMD_DEV
react-dom-test-utils.production.min.js	0.0%	0.0%	11.19 KB	11.19 KB	4.16 KB	4.16 KB	UMD_PROD
react-dom-unstable-fizz.browser.production.min.js	0.0%	🔺+0.1%	1.2 KB	1.2 KB	699 B	700 B	UMD_PROD
react-dom-unstable-fizz.browser.development.js	0.0%	+0.1%	3.61 KB	3.61 KB	1.48 KB	1.48 KB	NODE_DEV
react-dom-test-utils.production.min.js	0.0%	0.0%	10.96 KB	10.96 KB	4.09 KB	4.09 KB	NODE_PROD
react-dom-unstable-fizz.browser.production.min.js	0.0%	🔺+0.3%	1.04 KB	1.04 KB	630 B	632 B	NODE_PROD
react-dom.development.js	+0.1%	0.0%	921.71 KB	922.23 KB	208.28 KB	208.35 KB	UMD_DEV
react-dom.production.min.js	0.0%	0.0%	112.25 KB	112.27 KB	36.22 KB	36.24 KB	UMD_PROD
react-dom.profiling.min.js	0.0%	-0.1%	115.65 KB	115.66 KB	37.2 KB	37.17 KB	UMD_PROFILING
react-dom.development.js	+0.1%	0.0%	915.81 KB	916.32 KB	206.68 KB	206.74 KB	NODE_DEV
react-dom.production.min.js	0.0%	0.0%	112.18 KB	112.2 KB	35.56 KB	35.56 KB	NODE_PROD
ReactDOM-prod.js	0.0%	0.0%	374.83 KB	374.84 KB	68.54 KB	68.57 KB	FB_WWW_PROD
ReactDOM-profiling.js	0.0%	0.0%	380.31 KB	380.32 KB	69.59 KB	69.59 KB	FB_WWW_PROFILING
react-dom-server.browser.development.js	0.0%	0.0%	138.04 KB	138.04 KB	36.11 KB	36.11 KB	NODE_DEV
react-dom-server.browser.production.min.js	0.0%	0.0%	19.73 KB	19.73 KB	7.34 KB	7.34 KB	NODE_PROD
react-dom-unstable-native-dependencies.development.js	0.0%	0.0%	60.71 KB	60.71 KB	15.84 KB	15.84 KB	UMD_DEV
react-dom-unstable-native-dependencies.production.min.js	0.0%	🔺+0.1%	10.75 KB	10.75 KB	3.67 KB	3.67 KB	UMD_PROD
react-dom-unstable-native-dependencies.development.js	0.0%	0.0%	60.39 KB	60.39 KB	15.72 KB	15.72 KB	NODE_DEV
react-dom-unstable-fizz.node.development.js	0.0%	+0.1%	3.87 KB	3.87 KB	1.51 KB	1.51 KB	NODE_DEV
react-dom-unstable-native-dependencies.production.min.js	0.0%	0.0%	10.49 KB	10.49 KB	3.57 KB	3.57 KB	NODE_PROD
react-dom-unstable-fizz.node.production.min.js	0.0%	🔺+0.2%	1.1 KB	1.1 KB	665 B	666 B	NODE_PROD

react-test-renderer

File	Filesize Diff	Gzip Diff	Prev Size	Current Size	Prev Gzip	Current Gzip	ENV
ReactTestRenderer-dev.js	+0.1%	+0.1%	615.82 KB	616.26 KB	128.04 KB	128.1 KB	FB_WWW_DEV
react-test-renderer-shallow.development.js	0.0%	-0.0%	39.21 KB	39.21 KB	9.95 KB	9.95 KB	UMD_DEV
react-test-renderer-shallow.production.min.js	0.0%	0.0%	11.41 KB	11.41 KB	3.53 KB	3.53 KB	UMD_PROD
react-test-renderer-shallow.development.js	0.0%	0.0%	33.18 KB	33.18 KB	8.49 KB	8.49 KB	NODE_DEV
react-test-renderer-shallow.production.min.js	0.0%	0.0%	11.55 KB	11.55 KB	3.62 KB	3.62 KB	NODE_PROD
react-test-renderer.development.js	+0.1%	+0.1%	602.74 KB	603.25 KB	128.65 KB	128.71 KB	UMD_DEV
react-test-renderer.production.min.js	0.0%	0.0%	68.96 KB	68.96 KB	21.16 KB	21.17 KB	UMD_PROD
react-test-renderer.development.js	+0.1%	+0.1%	598.07 KB	598.58 KB	127.45 KB	127.52 KB	NODE_DEV
react-test-renderer.production.min.js	0.0%	0.0%	68.65 KB	68.65 KB	20.88 KB	20.89 KB	NODE_PROD

react-reconciler

File	Filesize Diff	Gzip Diff	Prev Size	Current Size	Prev Gzip	Current Gzip	ENV
react-reconciler.development.js	+0.1%	+0.1%	588.07 KB	588.58 KB	124.59 KB	124.66 KB	NODE_DEV
react-reconciler.production.min.js	🔺+0.1%	🔺+0.1%	69.06 KB	69.13 KB	20.44 KB	20.47 KB	NODE_PROD
react-reconciler-reflection.production.min.js	0.0%	🔺+0.1%	2.6 KB	2.6 KB	1.16 KB	1.16 KB	NODE_PROD
react-reconciler-persistent.development.js	+0.1%	+0.1%	585.07 KB	585.58 KB	123.33 KB	123.4 KB	NODE_DEV
react-reconciler-persistent.production.min.js	🔺+0.1%	🔺+0.1%	69.07 KB	69.14 KB	20.45 KB	20.48 KB	NODE_PROD

react-native-renderer

File	Filesize Diff	Gzip Diff	Prev Size	Current Size	Prev Gzip	Current Gzip	ENV
ReactFabric-profiling.js	0.0%	0.0%	270.47 KB	270.47 KB	46.6 KB	46.6 KB	RN_OSS_PROFILING
ReactFabric-dev.js	+0.1%	0.0%	743.98 KB	744.43 KB	157.15 KB	157.22 KB	RN_FB_DEV
ReactNativeRenderer-dev.js	+0.1%	0.0%	737.38 KB	737.82 KB	155.99 KB	156.06 KB	RN_OSS_DEV
ReactFabric-profiling.js	0.0%	0.0%	270.46 KB	270.46 KB	46.61 KB	46.61 KB	RN_FB_PROFILING
ReactNativeRenderer-dev.js	+0.1%	0.0%	737.54 KB	737.98 KB	156.06 KB	156.13 KB	RN_FB_DEV
ReactFabric-dev.js	+0.1%	0.0%	743.81 KB	744.26 KB	157.07 KB	157.14 KB	RN_OSS_DEV

Generated by 🚫 dangerJS against 6acafc3