…NGLE configurations r=kvark

Frames captured by the composition recorder on non-ANGLE configurations were
previously written upside down to disk. We now flip them right side up when
mapping them into memory.

Differential Revision: https://phabricator.services.mozilla.com/D40113

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/dccb73a9ee2b1ae7e890eac4d18769bfa8f2857b

Differential Revision: https://phabricator.services.mozilla.com/D41488

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/d07875a4f37441f92045e491b07b0f7fe0f6de97

…colors. r=kvark

With this patch, tiles that are covered only by the opaque backdrop
primitive are detected and noted as solid colors.

Solid color tiles save memory and performance, because:
 - No texture slice is allocated as a render target for them.
 - No need to rasterize this tile.
 - Drawing the tile is done with the faster rectangle shader.

This already saves performance and GPU memory on quite a few
real world sites (esp. when running at 4k). However, the main
benefit of this will be once we enable picture caching on
multiple content slices and the UI layer. When this occurs, it's
important to avoid allocating tile buffers for all the solid
rectangle tiles that the UI layer typically contains.

Differential Revision: https://phabricator.services.mozilla.com/D41342

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/96075609026a3816cb7a6dcf9cf3795afe7f82d6

Differential Revision: https://phabricator.services.mozilla.com/D39097

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/b5d6ed62cda18c51ae303d6b904771850a3d1e03

Differential Revision: https://phabricator.services.mozilla.com/D39098

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/abdb4f5f3323cc1474d02a3722741c5d2cea5df7

…t r=gw,nical

Fixes an issue when backdrop-filter is used many time on a page where we would
spend a large amount of time reevaluating render tasks when assigning task depths.

Differential Revision: https://phabricator.services.mozilla.com/D41252

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/0c820a515e16953b3945ac670dac13099a568f6a

…nical

Differential Revision: https://phabricator.services.mozilla.com/D41840

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/71b7ef6e0ed8b224e2715f894887587b1a80b34e

…ild bustages on svg-filter-offset-ref.yaml.

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/c9f306364c7d79c316cedb484da364944909a1a4

…g r=kvark

Differential Revision: https://phabricator.services.mozilla.com/D42013

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/26094588b48e14bb39fb838196e8d489b1a4c3ee

…nical

Differential Revision: https://phabricator.services.mozilla.com/D41840

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/d596e6b5be6a5a68eb459dbb9e098e359b25ccce

… offsets r=gw

Since the filtered-backdrop is 1:1 with the backdrop, we don't want any snap offsets to shift the contents

Differential Revision: https://phabricator.services.mozilla.com/D42042

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/9e513ae4747fad12001ef627e6f273624a3feff4