Remove *.mojom.dart from //{,mojo/public/dart/}.gitignore, stop copying during build

Remove *.mojom.dart from //{,mojo/public/dart/}.gitignore, stop copying during build

We shouldn't have any mojom.dart files in the tree right now. When we do
we do not want to be .gitignore'ing them. We also should not be copying files from
the build directory into the source directory during a build. In practice this
seemed to only be copying files into //mojo/public/dart/mojo/sdk_ext/lib/ for
reasons not entirely clear to me.

R=johnmccutchan@google.com

Committed: https://chromium.googlesource.com/external/mojo/+/235f99dc51bbeb1c00aa7480443c7eb98d0a858a

[jamesr, 2015-11-11 20:44:01]

Description was changed from

==========
Remove *.mojom.dart from //{,mojo/public/dart/}.gitignore

We shouldn't have any mojom.dart files in the tree right now. When we do
we do not want to be .gitignore'ing them.
==========

to

==========
Remove *.mojom.dart from //{,mojo/public/dart/}.gitignore, stop copying during
build

We shouldn't have any mojom.dart files in the tree right now. When we do
we do not want to be .gitignore'ing them. We also should not be copying files
from
the build directory into the source directory during a build. In practice this
seemed to only be copying files into //mojo/public/dart/mojo/sdk_ext/lib/ for
reasons not entirely clear to me.
==========

[jamesr, 2015-11-11 20:44:01]

jamesr@chromium.org changed reviewers:
+ cutnmccutchan@google.com

[jamesr, 2015-11-11 20:44:46]

jamesr@chromium.org changed reviewers:
+ johnmccutchan@google.com
- cutnmccutchan@google.com

[jamesr, 2015-11-11 20:44:47]

John - sending this out so I can start figuring out how to deal with the many
mojom.dart files that are currently in people's trees.

[Cutch, 2015-11-11 20:45:31]

lgtm

[zra, 2015-11-11 20:53:26]

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

[zra, 2015-11-11 20:53:27]

It looks like there's also a *.mojom.dart entry in //mojo/public/dart/.gitignore

[zra, 2015-11-11 20:53:56]

On 2015/11/11 20:53:27, zra wrote:
> It looks like there's also a *.mojom.dart entry in
//mojo/public/dart/.gitignore

Oh. Whoops. you got it already =)

[jamesr, 2015-11-11 21:10:56]

Committed patchset #2 (id:20001) manually as
235f99dc51bbeb1c00aa7480443c7eb98d0a858a (presubmit successful).