traces from base and the shell view dart isolate simultaneously.
Trace files contain samples from multiple sources and must be merged
separately

directory on the device.

This work is to support a workflow where developers testing on an iOS
device will automatically see their app updates as they change their Sky
code. Currently this works by using the ios-deploy tool:
$ ios-deploy --bundle_id 'org.domokit.sky.game' --upload out/ios_Debug/game_app.app/app.skyx --to Documents/app.skyx
Upcoming commits will incorporate this into skytool.

Instead of using back pressure from swap buffers to drive the engine, this
patch using the vsync signal from the Android framework. We still respect
back pressure from swap buffers if we get too far ahead.

This patch moves us back to compressing assets in APKs. We lost compression
when we updated Chromium recently. This brings typical Sky APKs down to 7.2MB.

Fixes #134

We still have a few tests failing, I believe
due to different font metrics.  Otherwise this works!

R=abarth@google.com

This CL introduces a SkyShell.apk that is separate from the SkyDemo.apk that we
upload to the store to show our demos.  The SkyShell.apk is just an empty shell
that can run Sky applications on Android.

- Add missing dependencies caught by gn's new stricter checker
- Update opentype code to use new OTS API. This code is updated from HEAD
  Blink.
- Add base dependency to wtf to avoid redefining marcos from base/macros.h
- Update callers of various base string utility functions to use base
  namespace.

There's no longer any code to share in this library. Instead, inline the one
trival class into both //sky/shell and //services/sky.

TBR=eseidel@google.com

Review URL: https://codereview.chromium.org/1237043002 .

R=ianh@google.com

Review URL: https://codereview.chromium.org/1235813005 .

R=abarth@chromium.org, eseidel@chromium.org

Review URL: https://codereview.chromium.org/1229093002 .

At startup, we make a list of all the temp directories that already exist and
then nuke them on a background thread after a five second delay. The five
second delay isn't particularly satisfying, but I think it's wortwhile to get
this work off the critical path of startup.

R=eseidel@chromium.org, eseidel@google.com

Review URL: https://codereview.chromium.org/1228083003 .

Now that we have all the Dart packages we need in //third_party, we can build
skyx bundles by default.

As part of this change, I've made it possible to build skyx bundles on Linux
and I've made the gn target names of the mojoms in //sky/services consistent
with each other and with //mojo/services/public.

TBR=eseidel@google.com

Review URL: https://codereview.chromium.org/1227973002 .

This interface is growing to expose many activity-related functions, more than
just intents.

R=eseidel@chromium.org, eseidel@google.com

Review URL: https://codereview.chromium.org/1223053002 .

R=abarth@chromium.org, abarth@google.com

Review URL: https://codereview.chromium.org/1213623008.

This CL prepares us to have more interesting resources than base's
ResourceExtractor understands.

TBR=eseidel@google.com

Review URL: https://codereview.chromium.org/1221153002.

The term ViewportObserver doesn't mean anything. This interface has evolved to
control the engine. This new name reflects that.

TBR=eseidel@google.com

Review URL: https://codereview.chromium.org/1222663003.

This CL makes it possible to run sky/tests/raw/bogus_import.dart in sky_shell
on Linux. We'd eventually like to scale this up to running all the tests.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1218633003.

Unbreak support for snapshots now that we have our offline Dart loader. Also,
wire up support for snapshots in sky_shell on Linux.

TBR=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1212623002.

This CL makes it possible to run Sky apps offline by introducing new
DartLibraryProvider subclasses, specifically one that can load directly from
the file system. A future CL will expand this functionality to work with asset
bundles as well.

Currently, the only platform that uses this functionality is Linux, which can
now load a simple Sky app without even loading a network stack. Making this
work on other platforms is work for future CLs.

TBR=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1203143004.

This CL makes it possible to build sky_shell on Linux. It doesn't do much, but
it doesn't crash on startup. The goal is to evetually be able to test sky_shell
on the bots and to be able to run the test_sky on Mac.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1202323002.

The plan is to use this service for game assets and offline assets.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1193763004.

BUG=
R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1188633002.

This CL separates the view-specific state from the process-global state. The
view-specific state now lives on Instance rather than Shell.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1187503003.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1169983005.

BUG=
R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1159443002

This CL prepares us to create an iOS version of SkyShell by moving the
Android-specific bits into an android directory.

R=chinmaygarde@google.com

Review URL: https://codereview.chromium.org/1139873004

R=eseidel@chromium.org, qsr@chromium.org

Review URL: https://codereview.chromium.org/1088793003

This CL teaches shelldb how to trace SkyShell.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/1027903002

This CL introduces a new keyboard service that understands Android IME and
starts work on a Input component that interacts with this service to provide an
editing control.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/995613002

We now register the sensor service from SkyDemo, which shows that embedders of
SkyShell can register their own Java services.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/969753003

This is not complete gesture support by far, but it's a start.
MojoShell and Chrome use a C++ GestureDetector, this code attempts
to use the Android (Java) GestureDetector instead.

We probably should not be sending gesturetap until we've decided
it's not a scroll, etc, but this implementation does not go that far.

I had to fix a bug whereby we were assuming the InputEvent.time_stamp
was in TimeDelta's internal format, which was wrong.  When we get
time_stamp from Android its in ms since boot.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/969493002