Roll engine de4c7a5..ade0f22 (28 commits)

flutter/engine@de4c7a5...ade0f22

git log de4c7a5..ade0f22 --no-merges --oneline
ade0f22 Remove unused file picture_serializer. (flutter/engine#6179)
572753f Roll src/third_party/skia 343553a1fe9e..ffbcc3fadfa1 (6 commits) (flutter/engine#6178)
108e0a6 Add transparency helpers to FlutterView.java (flutter/engine#6172)
f6ad3e0 Roll Tonic (flutter/engine#6177)
a0f30b3 Roll src/third_party/skia 9d1c88d9912d..343553a1fe9e (16 commits) (flutter/engine#6175)
e6d9b34 Remove the old location of the ICU data asset (flutter/engine#6170)
9f0ad8b Fixes negative end selection offset. (flutter/engine#6171)
0981731 Enable transparent FlutterViews (flutter/engine#6163)
3a7d0b5 Roll buildroot to 7aadfaf (flutter/engine#6169)
564d214 Roll src/third_party/skia d0f0cb8ffc5e..9d1c88d9912d (12 commits) (flutter/engine#6168)
6af60d7 Remove obsolete discovery mechanism from FlutterView (flutter/engine#6157)
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

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Author: engine-flutter-autoroll

bin/internal/engine.version

@@ -1 +1 @@
-de4c7a53f21cd0d2dd1cce9ea000e7f6a5398c2f
+ade0f22303716b28cbf27f6c8be5aa71e1c4608e