Add an implementation of url_loader.mojom using OkHttp

Add an implementation of url_loader.mojom using OkHttp

This CL is the beginnings of an implementation of url_loader.mojom using the
OkHttp library. OkHttp is a relatively simple HTTP client library for Android
that implements HTTP/1.1 and HTTP/2.0. We might want to use OkHttp to bootstrap
into a more full-featured network_service implementation based on //net.

R=jamesr@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/9c85fe573cb9eeaecf850f9ed6b26fb89caa8c12

[jamesr, 2015-02-18 22:46:10]

If I wanted to actually check the implementation, where would I find the docs
for OkHttp?

https://codereview.chromium.org/930673002/diff/1/sky/services/oknet/src/org/d...
File sky/services/oknet/src/org/domokit/oknet/NetworkServiceImpl.java (right):

https://codereview.chromium.org/930673002/diff/1/sky/services/oknet/src/org/d...
sky/services/oknet/src/org/domokit/oknet/NetworkServiceImpl.java:1: // Copyright
2014 The Chromium Authors. All rights reserved.
2015

https://codereview.chromium.org/930673002/diff/1/sky/services/oknet/src/org/d...
File sky/services/oknet/src/org/domokit/oknet/UrlLoaderImpl.java (right):

https://codereview.chromium.org/930673002/diff/1/sky/services/oknet/src/org/d...
sky/services/oknet/src/org/domokit/oknet/UrlLoaderImpl.java:1: // Copyright 2014
The Chromium Authors. All rights reserved.
ditto

https://codereview.chromium.org/930673002/diff/20001/sky/services/oknet/src/o...
File sky/services/oknet/src/org/domokit/oknet/NetworkServiceImpl.java (right):

https://codereview.chromium.org/930673002/diff/20001/sky/services/oknet/src/o...
sky/services/oknet/src/org/domokit/oknet/NetworkServiceImpl.java:48:
cookieStore.close();
is there a java way to log a NOTIMPLEMENTED error?

[abarth-chromium, 2015-02-18 22:56:43]

On 2015/02/18 at 22:46:10, jamesr wrote:
> If I wanted to actually check the implementation, where would I find the docs
for OkHttp?

http://square.github.io/okhttp/ is the main page.
http://square.github.io/okhttp/javadoc/index.html is the javadoc.

[abarth-chromium, 2015-02-18 22:58:09]

https://codereview.chromium.org/930673002/diff/20001/sky/services/oknet/src/o...
File sky/services/oknet/src/org/domokit/oknet/NetworkServiceImpl.java (right):

https://codereview.chromium.org/930673002/diff/20001/sky/services/oknet/src/o...
sky/services/oknet/src/org/domokit/oknet/NetworkServiceImpl.java:48:
cookieStore.close();
On 2015/02/18 at 22:46:10, jamesr wrote:
> is there a java way to log a NOTIMPLEMENTED error?

We can throw
https://commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/apache/co...

We can also log something using the Android Log API.

[jamesr, 2015-02-18 23:38:02]

lgtm

https://codereview.chromium.org/930673002/diff/40001/sky/services/oknet/src/o...
File sky/services/oknet/src/org/domokit/oknet/UrlLoaderImpl.java (right):

https://codereview.chromium.org/930673002/diff/40001/sky/services/oknet/src/o...
sky/services/oknet/src/org/domokit/oknet/UrlLoaderImpl.java:133: //
TODO(abarth): Which mError.code should we set?
the codes are actually defined as a mojom enumeration on ToT.  IOException isn't
a super useful class to describe the error, though

[abarth-chromium, 2015-02-19 00:53:09]

Committed patchset #3 (id:40001) manually as
9c85fe573cb9eeaecf850f9ed6b26fb89caa8c12 (presubmit successful).