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danakj authored
When the live tiles rect changes on the active tiling, we also remove tiles on the recycled tiling to avoid unshared tiles in the recycle tree. But when a tile is created on the active tree, we should also share the tile to the recycle tree. Since we're creating tiles, we also need to update the live tiles rect so tiles do not exist outside of it. So now the live tiles rect is simply updated on both trees at once. This ensures that on the next commit, if the picture layer did not get any invalidations, and doesn't push properties, it still has all the tiles in its live tiles rect so we can do ready-to-activate checks correctly. Secondly, when activating, if any tiles were present on the pending tree but are not on the active tree (can happen due to missing recordings on the active tree), then share those tiles to the active tree during activation. This patch fixes DCHECKs occuring in PictureLayerTiling's CloneTilesAndPropertiesFrom() where the pending and active tiling were not ending up with the same number of tiles. R=enne, vmpstr BUG=387116 Review URL: https://codereview.chromium.org/799463005 Cr-Commit-Position: refs/heads/master@{#308174}
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