Convert a bunch of test_shell_tests to content_browsertests. These are tests that depend on loading…

Convert the remaining test_shell_tests to content_browsertests.

DomOperationsTests.*, DomSerializerTests.* and ResourceFetcherTests.* depended on TestShell loading URLs correctly. That couldn't be done with RenderViewTest harness since ResourceDispatcher code isn't hooked up. I added a mechanism for the browser test harness to run code on the renderer thread when running in --single-process mode. That way a "browser test" can poke at the renderer code. single-process mode doesn't work on Linux Aura, so disabled those tests there for now (bug 234172). DomSerializerTests.* fail on  Android. They never ran there before since test_shell_tests never worked there, so just disabled them there with a note to investigate.

Note CppBoundClassTest is trivial and doesn't depend on loading, so I just made it a RenderViewTest.

I removed plugin_tests.cc:
-PluginTest.Refresh won't work with sharding. It's for a use case we don't care much about anyways, so a regression, if it happens, isn't critical.
-PluginTest.DeleteFrameDuringEvent is a duplicate of PluginTest.SelfDeletePluginInvokeInSynchronousMouseUp
-PluginTest.ForceReload is for in process plugins (i.e. test shell), doesn't apply to our multi-process plugins
-PluginTest.PluginVisibilty is currently disabled and failing. I thought about porting it and fixing it, but it seemed low priority since it'd be flaky to test this with our multi-process plugins. This code also doesn't change anymore, and if we had a regression we would catch this pretty quickly. If we regress we can write a test then.

mock_spellcheck_unittest.cc: was testing a mock object used in TestShell. Since TestShell is going away, there's no need for this test. if the object breaks and no existing tests break, then it's a non-issue.

memory_file_util.cc wasn't used other than in its unittest. I removed the code and its test.

CppBoundClassTest.* could be converted to a RenderViewTest. The remaining tests (HostVarTrackerTest.*, papiPluginInstanceTest.*, PpapiCustomInterfaceFactoryTest.*, QuotaFileIOTest.*, WebkitGlueUserAgentTest.* were converted to content_unittests.

I will delete the unused webkit/data in a follow up patch (try servers are failing on applying the delete).

BUG=126514, 234172, 111601, 51622
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=195701

[sky, 2013-04-22 22:08:57]

LGTM - I'm not an OWNER for all of these files though (webkit, content/renderer)

[jam, 2013-04-22 22:13:06]

+brettw for src/webkit owners review

[brettw, 2013-04-22 23:24:09]

lgtm