Introduce base::TestSuite::DisableTests().

Introduce base::TestSuite::DisableTests().

Disables tests that match the |filter|. This gives the test suite an
opportunity to disable tests at runtime. Must be called before Run()
to take effect.

For example, to disable "FooTest" when IsFooSupported() is false:

if (!IsFooSupported())
  DisableTests("FooTest.*");
Run();

BUG=304956
TEST=Tested on Nexus 7 v2.

[Paweł Hajdan Jr., 2013-10-10 18:10:42]

"not lgtm"

We can discuss some possibly better ways to handle this.

https://codereview.chromium.org/26883002/diff/1/base/test/test_suite.cc
File base/test/test_suite.cc (right):

https://codereview.chromium.org/26883002/diff/1/base/test/test_suite.cc#newco...
base/test/test_suite.cc:147: ::testing::FLAGS_gtest_filter = gtest_filter;
Please don't do that. By the time you change it it may be too late, e.g. with
base/test/launcher/test_launcher.

[xhwang, 2013-10-10 18:56:59]

On 2013/10/10 18:10:42, Paweł Hajdan Jr. wrote:
> "not lgtm"
> 
> We can discuss some possibly better ways to handle this.
> 
> https://codereview.chromium.org/26883002/diff/1/base/test/test_suite.cc
> File base/test/test_suite.cc (right):
> 
>
https://codereview.chromium.org/26883002/diff/1/base/test/test_suite.cc#newco...
> base/test/test_suite.cc:147: ::testing::FLAGS_gtest_filter = gtest_filter;
> Please don't do that. By the time you change it it may be too late, e.g. with
> base/test/launcher/test_launcher.

Do you have thoughts on better ways to handle this? Or will it be acceptable if
I can also make test_launcher work with it?