Created methods to surface zone memory information for each isolate and thread in JSON.

runtime/vm/isolate_test.cc

Index: runtime/vm/isolate_test.cc
diff --git a/runtime/vm/isolate_test.cc b/runtime/vm/isolate_test.cc
index 5e71ed7fa95d547429fcbbece69f81f439b42b9b..3e8d96bd97b9cd39d95a131ed3b85e324af9017e 100644
--- a/runtime/vm/isolate_test.cc
+++ b/runtime/vm/isolate_test.cc
@@ -245,5 +245,4 @@ TEST_CASE(NoOOBMessageScope) {
   EXPECT_EQ(kZero, IsolateTestHelper::GetDeferredInterruptsMask(thread));
   EXPECT_EQ(kZero, IsolateTestHelper::GetDeferredInterrupts(thread));
 }
-

[zra, 2016/12/08 18:54:13]

Did clang-format remove this? I think we usually keep a space after a function
here.

[bkonyi, 2016/12/08 20:58:32]

I must have accidentally removed it when I deleted some tests I had written that
weren't useful. I'll add it back.

 }  // namespace dart