import changes from `dev' branch of rmottola/Arctic-Fox:

- Bug 1149185 - override GetMessageLoop() r=nical (42bec9405)
- Add a "blacklisted" property to d3d11 telemetry. (bug 1187453, r=mattwoodrow) (83bcb0e8e)
- Don't create a D3D11 compositor device on content processes. (bug 1183910 part 8, r=bas,mattwoodrow) (c03d496a6)
- Bug 1168889 - ContentClientSingleBuffered needs to upload during the transaction. r=nical (35171fe14)
- Bug 1176077 - Only recompute PaintedLayer item visibility when display list has changed. r=mattwoodrow (0ea691594)
- Bug 1179298. ClientTiledPaintedLayer should allow empty transactions to succeed if it doesn't need to draw anything. r=mattwoodrow (4aaad97b2)
- Bug 1169200 - Send OpRemoveTextureAsync before actor destroyed r=nical (86007156c)
- Bug 1158838 - Add some gfxCriticalError logging. r=milan (32bf80848)
- Bug 1129871 - Avoid copying TileClient when not necessary. r=BenWa (1ac30bcc2)
- Bug 1186911 - Fix progressive paint when using tiled-drawtarget. r=nical (87649fb8d)
- Bug 1118876 - Add edge padding with DrawTargetTiled. r=jrmuizel (64b12cf6a)
- Bug 1157677 - Fix uninitialized members warning in ClientTiledLayerBuffer. r=nical (d11d0da30)
- Bug 1151071 - Make sure low-resolution tiles are transparent. r=mattwoodrow (164446378)
- Bug 1170390 - Use Optimal2DFormatForContent over OptimalFormatForContent to avoid enum conversions. r=jrmuizel (db7ee2c31)
- Bug 1180326 - Part 1: Abstract parts of the client side tiling that we need. r=jrmuizel (0ad7651fe)
- Bug 1179987 - Remove painted region from SurfaceDescriptorTiles since it isn't used any more. r=nical (653e9389e)
- Bug 1180326 - Part 2: Add support for variable tile sizes. r=jrmuizel (081349a5e)
- Bug 1180326 - Part 3: Move repeated code into GetBackBuffer. r=jrmuizel (2e9091ae1)
- Bug 1180326 - Part 4: Add new content client. r=jrmuizel (7362d805b)
- Bug 1180326 - Part 5: Support HWC with tiling when we only have 1 tile. r=jrmuizel (09ce93b7e)
- Bug 1152461 - Don't use tiled layers for overflow:hidden scroll frames. r=tn (804a683a1)
- Bug 961887 - Add some reftest fuzz. (dcd707004)
- Bug 1186061 patch 1 - Add feature to reftest harness to allow skipping the flush. r=mattwoodrow (8cefe9640)
- Bug 1176969 - Disable OMT animation for any frame in a preserve-3d scene rather than only frames whose parent and child are in a preserve-3d scene. r=mattwoodrow (693d0a518)
- Bug 1176969 followup - Annotate new reftests as intermittently fuzzy on Mac. (0269d5d8f)
- Bug 1176969 followup - Increase error amounts for intermittent fuzzy-if(cocoaWidget). (116039ed0)
- Bug 1176969 followup - Mark test as random for now until I have a chance to rewrite it. (8ba561f83)
- Bug 1176969 followup - Reorganize the timing of the reftest to make it more reliable. (f3ffc93cd)
- Bug 1186061 patch 2 - Disable compositor thread animation of transforms when backface-visibility is hidden. r=mattwoodrow (e67bed9fb)
- Bug 1169666 - Mark reftests failing due to scrollbar transparency random on GTK3. r=karlt (0c6080d55)
- Bug 1180326 - Part 6: Use SingleTiledContentClient for non-scrollable layers on b2g and OSX. r=jrmuizel (079951f0a)
- Bug 1189261 - Mark tile invalid region in coordinates relative to the tile. r=jrmuizel (7e696c911)
- Bug 1187619 - Only optmimize FrameLayerBuilder visibility calculations if correct. r=mattwoodrow (05228ad31)
- Bug 1190950: Check mappings and surfaces for UpdateFromSurface more robustly. r=mattwoodrow (c00adba10)
- Remove the backend flag to TextureClient::CreateForDrawing. (bug 1183910 part 9, r=mattwoodrow) (5df1d964c)
- Bug 1135935 - Part 1: Don't implement ISurfaceAllocator for the texture recycler. r=sotaro (bcba93d3d)
- Bug 1135935 - Part 2: Merge TextureClientRecycleAllocator into base class. r=sotaro (8f4e7b6b1)
- Bug 1135935 - Part 3: Allow overriding of allocations for texture client recycling. r=sotaro (35d7499e9)
- Bug 1135935 - Part 4: Move IDirect3DTexture9 allocations and ownership into the TextureClient. r=jrmuizel (e62cf9acf)
- Bug 1135935 - Part 5: Add D3D9 texture recycler. r=jrmuizel (8ab85b064)
- Bug 1135935 - Part 6: Wait for the compositor to stop using textures before recycling them. r=jrmuizel (ae0c45cfd)

gfx/layers/client/ClientPaintedLayer.cpp

@@ -87,6 +87,7 @@ ClientPaintedLayer::PaintThebes()
     ClientManager()->GetPaintedLayerCallback()(this,
                                               ctx,
                                               iter.mDrawRegion,
+                                              nullptr,
                                               state.mClip,
                                               state.mRegionToInvalidate,
                                               ClientManager()->GetPaintedLayerCallbackData());
@@ -141,22 +142,6 @@ ClientPaintedLayer::RenderLayerWithReadback(ReadbackProcessor *aReadback)
   mContentClient->EndPaint(&readbackUpdates);
 }
 
-bool
-ClientLayerManager::IsOptimizedFor(PaintedLayer* aLayer, PaintedLayerCreationHint aHint)
-{
-#ifdef MOZ_B2G
-  // The only creation hint is whether the layer is scrollable or not, and this
-  // is only respected on B2G, where it's used to determine whether to use
-  // tiled layers or not.
-  // There are pretty nasty performance consequences for not using tiles on
-  // large, scrollable layers, so we want the layer to be recreated in this
-  // situation.
-  return aHint == aLayer->GetCreationHint();
-#else
-  return LayerManager::IsOptimizedFor(aLayer, aHint);
-#endif
-}
-
 already_AddRefed<PaintedLayer>
 ClientLayerManager::CreatePaintedLayer()
 {
@@ -167,11 +152,7 @@ already_AddRefed<PaintedLayer>
 ClientLayerManager::CreatePaintedLayerWithHint(PaintedLayerCreationHint aHint)
 {
   NS_ASSERTION(InConstruction(), "Only allowed in construction phase");
-  if (
-#ifdef MOZ_B2G
-      aHint == SCROLLABLE &&
-#endif
-      gfxPrefs::LayersTilesEnabled()
+  if (gfxPrefs::LayersTilesEnabled()
 #ifndef MOZ_X11
       && (AsShadowForwarder()->GetCompositorBackendType() == LayersBackend::LAYERS_OPENGL ||
           AsShadowForwarder()->GetCompositorBackendType() == LayersBackend::LAYERS_D3D9 ||