EDK: Add a mojo::test::SimpleTestThread (and use it).

EDK: Add a mojo::test::SimpleTestThread (and use it).

This replaces (direct) uses of base::SimpleThread. (Currently, its
implemented on top of base::SimpleThread, but that's easy enough to
replace.)

R=vardhan@google.com

Committed: https://chromium.googlesource.com/external/mojo/+/de1a2abe32ba3c26db31570db387305c9c0fe39c

[vardhan, 2015-09-23 23:36:22]

lgtm

https://codereview.chromium.org/1361143004/diff/1/mojo/edk/test/simple_test_t...
File mojo/edk/test/simple_test_thread.h (right):

https://codereview.chromium.org/1361143004/diff/1/mojo/edk/test/simple_test_t...
mojo/edk/test/simple_test_thread.h:26: // Note: Subclasses must implement:
Could this note be above the class?

[viettrungluu, 2015-09-23 23:37:13]

https://codereview.chromium.org/1361143004/diff/1/mojo/edk/test/simple_test_t...
File mojo/edk/test/simple_test_thread.h (right):

https://codereview.chromium.org/1361143004/diff/1/mojo/edk/test/simple_test_t...
mojo/edk/test/simple_test_thread.h:26: // Note: Subclasses must implement:
On 2015/09/23 23:36:22, vardhan wrote:
> Could this note be above the class?

It could be, but it's sitting there as a placeholder for when I uncomment it.

[viettrungluu, 2015-09-23 23:37:35]

Committed patchset #1 (id:1) manually as
de1a2abe32ba3c26db31570db387305c9c0fe39c (presubmit successful).