Backed out changeset 2f9e4f4b4131 (bug 1787706) for causing reftest/wpt failures. CLOSED TREE

gfx/thebes/gfxPlatform.cpp

@@ -590,7 +590,7 @@ static void WebRenderBatchingPrefChangeCallback(const char* aPrefName, void*) {
 static void WebRenderBlobTileSizePrefChangeCallback(const char* aPrefName,
                                                     void*) {
   uint32_t tileSize = Preferences::GetUint(
-      StaticPrefs::GetPrefName_gfx_webrender_blob_tile_size(), 512);
+      StaticPrefs::GetPrefName_gfx_webrender_blob_tile_size(), 256);
   gfx::gfxVars::SetWebRenderBlobTileSize(tileSize);
 }
 

modules/libpref/init/StaticPrefList.yaml

@@ -6110,7 +6110,7 @@
 
 - name: gfx.webrender.blob-tile-size
   type: uint32_t
-  value: 512
+  value: 256
   mirror: always
 
 - name: gfx.webrender.batched-upload-threshold