Add initializeFromShellProxy to application.dart

Add initializeFromShellProxy to application.dart

This CL adds the ability to initialize the Dart Application class with a shell
proxy (rather than with a MojoHandle). This change lets Sky use the Dart
bindings for Mojo.

This CL was reviewed on the SkyDart branch in
https://codereview.chromium.org/919883002/

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

Committed: https://chromium.googlesource.com/external/mojo/+/94a22312a24fb2ca262f3f9fb5b3ba377b29844b

[abarth-chromium, 2015-02-13 06:00:13]

@zra: You saw this change before on the SkyDart branch, but we're ready to land
this on truck now.  You didn't LGTM the patch on the branch, so I wanted to give
you another chance to provided feedback before landing on trunk.

[zra, 2015-02-13 07:14:23]

zra@google.com changed reviewers:
+ zra@google.com

[zra, 2015-02-13 07:14:24]

lgtm with nit

https://codereview.chromium.org/922083002/diff/1/mojo/public/dart/src/applica...
File mojo/public/dart/src/application.dart (right):

https://codereview.chromium.org/922083002/diff/1/mojo/public/dart/src/applica...
mojo/public/dart/src/application.dart:92: // mojo services. Do not use for any
other purpose.
thanks for adding this.

https://codereview.chromium.org/922083002/diff/1/sky/examples/dart-mojo.sky
File sky/examples/dart-mojo.sky (right):

https://codereview.chromium.org/922083002/diff/1/sky/examples/dart-mojo.sky#n...
sky/examples/dart-mojo.sky:77: var shellProxy = new
shell_mojom.ShellProxy.fromHandle(new
MojoHandle(internals.passShellProxyHandle()));
If Dart code in .sky files should follow Dart style, then these lines should be
< 80 chars.

[abarth-chromium, 2015-02-13 07:16:50]

Thanks!

https://codereview.chromium.org/922083002/diff/1/sky/examples/dart-mojo.sky
File sky/examples/dart-mojo.sky (right):

https://codereview.chromium.org/922083002/diff/1/sky/examples/dart-mojo.sky#n...
sky/examples/dart-mojo.sky:77: var shellProxy = new
shell_mojom.ShellProxy.fromHandle(new
MojoHandle(internals.passShellProxyHandle()));
On 2015/02/13 at 07:14:23, zra wrote:
> If Dart code in .sky files should follow Dart style, then these lines should
be < 80 chars.

Will fix.

[abarth-chromium, 2015-02-13 07:52:18]

Committed patchset #1 (id:1) manually as
94a22312a24fb2ca262f3f9fb5b3ba377b29844b (presubmit successful).