When running DM, write test failures to json.

Add skiatest::Failure to keep track of data about a test failure.

Reporter::reportFailed and ::onReportFailed now take Failure as a
parameter. This allows the implementation to treat the failure as it
wishes. Provide a helper to format the failure the same as prior to
the change.

Update the macros for calling reportFailed (REPORTER_ASSERT etc) to
create a Failure object.

Convert a direct call to reportFailed to the macro ERRORF.

Write Failures to Json.
Sample output when running dm on the dummy test crrev.com/705723004:
{
   "test_results" : {
      "failures" : [
         {
            "condition" : "0 > 3",
            "file_name" : "../../tests/DummyTest.cpp",
            "line_no" : 10,
            "message" : ""
         },
         {
            "condition" : "false",
            "file_name" : "../../tests/DummyTest.cpp",
            "line_no" : 4,
            "message" : ""
         },
         {
            "condition" : "1 == 3",
            "file_name" : "../../tests/DummyTest.cpp",
            "line_no" : 5,
            "message" : "I can too count!"
         },
         {
            "condition" : "",
            "file_name" : "../../tests/DummyTest.cpp",
            "line_no" : 6,
            "message" : "seven is 7"
         },
         {
            "condition" : "1 == 3",
            "file_name" : "../../tests/DummyTest.cpp",
            "line_no" : 14,
            "message" : "I can too count!"
         }
      ]
   }
}

Report all of the failures from one test.
Previously, if one test had multiple failures, only one was reportered.
e.g:

Failures:
  test Dummy: ../../tests/DummyTest.cpp:6   seven is 7
  test Dummy2: ../../tests/DummyTest.cpp:10 0 > 3
  test Dummy3: ../../tests/DummyTest.cpp:14 I can too count!: 1 == 3
3 failures.

Now, we get all the messages:

Failures:
  test Dummy: ../../tests/DummyTest.cpp:4   false
        ../../tests/DummyTest.cpp:5 I can too count!: 1 == 3
        ../../tests/DummyTest.cpp:6 seven is 7
  test Dummy2: ../../tests/DummyTest.cpp:10 0 > 3
  test Dummy3: ../../tests/DummyTest.cpp:14 I can too count!: 1 == 3
3 failures.

(Note that we still state "3 failures" because 3 DM::Tasks failed.)

BUG=skia:3082
BUG=skia:2454

Review URL: https://codereview.chromium.org/694703005

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/GrTRecorderTest.cpp b/tests/GrTRecorderTest.cpp
index a5aedf687c..83bc445b5f 100644
--- a/tests/GrTRecorderTest.cpp
+++ b/tests/GrTRecorderTest.cpp
@@ -214,7 +214,7 @@ static void test_subclasses(skiatest::Reporter* reporter) {
                 break;
 
             default:
-                reporter->reportFailed(SkString("Invalid class type"));
+                ERRORF(reporter, "Invalid class type");
                 break;
         }
     }