Added json result of test output to output debug directory.

tools/testing/dart/configuration.dart

Index: tools/testing/dart/configuration.dart
diff --git a/tools/testing/dart/configuration.dart b/tools/testing/dart/configuration.dart
index 4e1723aeff5a70553d2878c3eacf65c12a5528f2..97481cd1fe90c3c89bd5cb1c339c2ea7f145b85a 100644
--- a/tools/testing/dart/configuration.dart
+++ b/tools/testing/dart/configuration.dart
@@ -52,6 +52,7 @@ class Configuration {
       this.useDart2JSWithKernelInSsa,
       this.writeDebugLog,
       this.writeTestOutcomeLog,
+      this.writeResultJsonLog,

[Bill Hesse, 2017/09/01 11:56:13]

Just writeResultLog, I think.

[mkroghj, 2017/09/04 10:43:34]

Done.

       this.drtPath,
       this.chromePath,
       this.safariPath,
@@ -74,6 +75,7 @@ class Configuration {
       this.packageRoot,
       this.suiteDirectory,
       this.builderTag,
+      this.debugOutputDirectory,

[Bill Hesse, 2017/09/01 11:56:13]

I wouldn't call it debugOutput, just output.

[mkroghj, 2017/09/04 10:43:34]

Done.

       this.reproducingArguments})
       : _packages = packages,
         _timeout = timeout;
@@ -115,6 +117,7 @@ class Configuration {
   final bool useDart2JSWithKernelInSsa;
   final bool writeDebugLog;
   final bool writeTestOutcomeLog;
+  final bool writeResultJsonLog;
 
   // Various file paths.
 
@@ -152,6 +155,7 @@ class Configuration {
     return _packages;
   }
 
+  final String debugOutputDirectory;
   final String packageRoot;
   final String suiteDirectory;
   final String builderTag;
@@ -419,6 +423,30 @@ class Configuration {
 
     return normal;
   }
+
+  /// [toSummaryMap] returns a map of configurations important to the running
+  /// of a test. Flags and properties used for output is not included.

[Bill Hesse, 2017/09/01 11:56:13]

are not included

[mkroghj, 2017/09/04 10:43:34]

Done.

+  /// Boolean flags that are false are not included in the map. The summary map
+  /// can be used to serialize to json for test-output logging.
+  Map toSummaryMap() {
+    return {
+      'mode': mode.name,
+      'arch': architecture.name,
+      'compiler': compiler.name,
+      'runtime': runtime.name,
+      'checked': isChecked,
+      'strong': isStrong,
+      'host_checked': isHostChecked,
+      'minified': isMinified,
+      'csp': isCsp,
+      'system': system.name,
+      'vm_options': vmOptions,
+      'use_sdk': useSdk,
+      'builder_tag': builderTag,
+      'fast_startup': useFastStartup,
+      'timeout': timeout
+    };
+  }
 }
 
 class Architecture {