[web][upstream] Don't register exit/saveCompilationTrace for web platform since they are not available (#37812)

* Don't register N/A services exit/saveCompilationTrace for web platform

This PR fixes an issue where MouseRegion crashes when being passed with closures instead of methods.

It changes how a RenderMouseRegion handles its MouseTrackingAnnotation.

Instead of creating a new annotation every time it becomes active and destroys it when deactivated, it now creates an annotation during the constructor and holds onto it until the end of its lifecycle.
Instead of directly passing the argument callbacks to the annotation, it proxies them using methods.

Fix an issue where MouseRegion will render its children twice.

(Breaking Change) Move some hardcoded pixel values to reusable constants.

git@github.com:flutter/engine.git/compare/797157bdecb5...f200ee13aa37

git log 797157bdecb5..f200ee13aa37 --no-merges --oneline
2019-08-07 skia-flutter-autoroll@skia.org Roll src/third_party/skia b2c5a94b1c7a..1dac7bc29f2d (5 commits) (flutter/engine#10707)
2019-08-07 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from UeWpb... to yqu1p... (flutter/engine#10704)
2019-08-07 dnfield@google.com Test perf overlay gold on Linux (flutter/engine#10703)

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git@github.com:flutter/engine.git/compare/81f695fc954a...797157bdecb5

git log 81f695fc954a..797157bdecb5 --no-merges --oneline
2019-08-07 jason-simmons@users.noreply.github.com Improvements to the flutter GDB script (flutter/engine#10675)
2019-08-07 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from 9PJXr... to 8mNHG... (flutter/engine#10701)
2019-08-07 stuartmorgan@google.com Roll swiftshader (flutter/engine#10699)
2019-08-07 skia-flutter-autoroll@skia.org Roll src/third_party/skia 593290ed75fd..b2c5a94b1c7a (9 commits) (flutter/engine#10697)
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See https://github.com/flutter/flutter/issues/37423

git@github.com:flutter/engine.git/compare/dac86eb7fbf7...81f695fc954a

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2019-08-07 bkonyi@google.com Roll src/third_party/dart f3139f57b4..f29f41f1a5 (3 commits) (flutter/engine#10693)
2019-08-07 shihaohong@google.com Roll buildroot forward to unbreak ToT (flutter/engine#10694)
2019-08-07 shihaohong@google.com Rolls engine to Android SDK 29 and its corresponding tools (flutter/engine#10692)
2019-08-07 goderbauer@google.com Fix empty composing range on iOS (flutter/engine#10381)
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The use-application-binary flag can be used to run a previously built
app package.

git@github.com:flutter/engine.git/compare/739b2dd4b271...dac86eb7fbf7

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2019-08-07 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from kYRKS... to eXzeO... (flutter/engine#10690)
2019-08-07 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from 0PouF... to 9PJXr... (flutter/engine#10688)
2019-08-07 bkonyi@google.com Roll src/third_party/dart 8740bb5c68..f3139f57b4 (7 commits)
2019-08-07 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from 14j-v... to kYRKS... (flutter/engine#10686)
2019-08-07 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from v5rSi... to 0PouF... (flutter/engine#10685)
2019-08-07 skia-flutter-autoroll@skia.org Roll src/third_party/skia c13305320fd1..ed19e97294f6 (4 commits) (flutter/engine#10684)
2019-08-07 bkonyi@google.com Roll src/third_party/dart c262cbd414..8740bb5c68 (18 commits)

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Guard removePointer with addTearDown to avoid cascading test crash.

git@github.com:flutter/engine.git/compare/9bfa4f53cdbe...739b2dd4b271

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2019-08-07 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from 9sR9P... to v5rSi... (flutter/engine#10678)
2019-08-07 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from eB-F0... to 14j-v... (flutter/engine#10676)
2019-08-07 skia-flutter-autoroll@skia.org Roll src/third_party/skia ab961e9db1dd..c13305320fd1 (2 commits) (flutter/engine#10677)

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git@github.com:flutter/engine.git/compare/42917704790d...9bfa4f53cdbe

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2019-08-07 stuartmorgan@google.com Roll buildroot back to an earlier version (flutter/engine#10681)
2019-08-07 stuartmorgan@google.com Roll buildroot to pick up EGL library name fix (flutter/engine#10679)
2019-08-06 chinmaygarde@google.com Remove semi-redundant try-jobs. (flutter/engine#10485)
2019-08-06 chinmaygarde@google.com Allow embedders to control Dart VM lifecycle on engine shutdown. (flutter/engine#10652)
2019-08-06 matthew-carroll@users.noreply.github.com Android embedding refactor pr40 add static engine cache (flutter/engine#10481)
2019-08-06 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from W6ZtV... to 9sR9P... (flutter/engine#10672)
2019-08-06 bkonyi@google.com Roll src/third_party/dart 574c4a51c6..c262cbd414 (11 commits)
2019-08-06 stuartmorgan@google.com Roll buildroot for ANGLE support (flutter/engine#10667)

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git@github.com:flutter/engine.git/compare/53bee4391ab5...42917704790d

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2019-08-06 skia-flutter-autoroll@skia.org Roll src/third_party/skia c853bf2867b9..ab961e9db1dd (10 commits) (flutter/engine#10669)
2019-08-06 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from kFlVe... to eB-F0... (flutter/engine#10668)

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git@github.com:flutter/engine.git/compare/80f80b14e000...53bee4391ab5

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2019-08-06 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from 0EOCG... to W6ZtV... (flutter/engine#10666)
2019-08-06 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from g3-Ex... to kFlVe... (flutter/engine#10664)
2019-08-06 skia-flutter-autoroll@skia.org Roll src/third_party/skia 3a543aafd4e6..c853bf2867b9 (4 commits) (flutter/engine#10665)
2019-08-06 chris@bracken.jp Migrate Fuchsia runners to SDK tracing API (flutter/engine#10478)

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This reverts commit aa2c93f8.

Provide a new ThemeData.from() method that constructs a Theme based off the colors in a given ColorScheme.

git@github.com:flutter/engine.git/compare/7f67b9f0dc63...80f80b14e000

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