Make skydb load examples/home.sky by default.

Make skydb load examples/home.sky by default.

I had to also register for the text/plain mime-type
which turned out to be harder than expected.
Mostly due to my confusion with mojo_shell
using last-argument-wins argument parsing.

R=ianh@google.com

Committed: https://chromium.googlesource.com/external/mojo/+/ff945ef78a6c1955a5ccb2c09d73f4d6f028c515

[eseidel, 2014-10-23 21:53:54]

eseidel@chromium.org changed reviewers:
+ abarth@chromium.org, ianh@google.com

[eseidel, 2014-10-23 21:53:54]

Ready for review.

[Hixie, 2014-10-23 21:54:54]

https://codereview.chromium.org/672363002/diff/1/sky/examples/home.sky
File sky/examples/home.sky (right):

https://codereview.chromium.org/672363002/diff/1/sky/examples/home.sky#newcode2
sky/examples/home.sky:2: <sky>
booo hissss

LGTM.

[Hixie, 2014-10-23 21:55:23]

https://codereview.chromium.org/672363002/diff/1/sky/tools/debugger/prompt/pr...
File sky/tools/debugger/prompt/prompt.cc (right):

https://codereview.chromium.org/672363002/diff/1/sky/tools/debugger/prompt/pr...
sky/tools/debugger/prompt/prompt.cc:51: }
why curlies?

[Hixie, 2014-10-23 21:56:21]

https://codereview.chromium.org/672363002/diff/1/sky/tools/skydb
File sky/tools/skydb (right):

https://codereview.chromium.org/672363002/diff/1/sky/tools/skydb#newcode16
sky/tools/skydb:16: SUPPORTED_MIME_TYPES = [
this is temporary, right? Long term we don't want any MIME types here.

[eseidel, 2014-10-23 21:56:48]

Committed patchset #1 (id:1) manually as
ff945ef78a6c1955a5ccb2c09d73f4d6f028c515 (presubmit successful).

[abarth-chromium, 2014-10-23 21:57:05]

lgtm

[eseidel, 2014-10-23 22:01:13]

Correct, temporary.

[Aaron Boodman, 2014-10-31 16:14:48]

aa@chromium.org changed reviewers:
+ aa@chromium.org

[Aaron Boodman, 2014-10-31 16:14:49]

https://codereview.chromium.org/672363002/diff/1/mojo/shell/dynamic_applicati...
File mojo/shell/dynamic_application_loader.cc (right):

https://codereview.chromium.org/672363002/diff/1/mojo/shell/dynamic_applicati...
mojo/shell/dynamic_application_loader.cc:178: << "INSECURELY LOADING AS
EXECUTABLE CODE INSTEAD" << std::endl;
Did you mean this as just temporary until sandboxing exists?

We want to enable loading executables, that's the point of this branch. We could
have a heuristic to try and detect whether something is a library, but it's not
going to result in less executable code being loaded.

[eseidel, 2014-10-31 16:47:06]

I believe I added that so that it was more clear what the default behavior was. 
I got the mime type wrong or something during testing and was confused why mojo
was just crashing instead of launching sky iirc.

It's true though... the current codepath just tries to load/execute any random
file mojo doesn't otherwise understand.