Reland of [Memory UMA] Return the extra_processes_dump map as part of the ResponseCallback

mojo/common/common_custom_types_unittest.cc

Index: mojo/common/common_custom_types_unittest.cc
diff --git a/mojo/common/common_custom_types_unittest.cc b/mojo/common/common_custom_types_unittest.cc
index b0943783879967e50a947624e50cb1e64aa79506..fd0cad1eed3733f5ae0250037bd629a1b5d62b6f 100644
--- a/mojo/common/common_custom_types_unittest.cc
+++ b/mojo/common/common_custom_types_unittest.cc
@@ -7,9 +7,12 @@
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/numerics/safe_math.h"
+#include "base/process/process_handle.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
+#include "mojo/common/common_custom_types_struct_traits.h"
+#include "mojo/common/process_id.mojom.h"
 #include "mojo/common/test_common_custom_types.mojom.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -224,6 +227,15 @@
   ptr->BounceNonce(token, ExpectResponse(&token, run_loop.QuitClosure()));
 
   run_loop.Run();
+}
+
+TEST_F(CommonCustomTypesTest, ProcessId) {
+  base::ProcessId pid = base::GetCurrentProcId();
+  base::ProcessId out_pid = base::kNullProcessId;
+  ASSERT_NE(pid, out_pid);
+  EXPECT_TRUE(mojom::ProcessId::Deserialize(mojom::ProcessId::Serialize(&pid),
+                                            &out_pid));
+  EXPECT_EQ(pid, out_pid);
 }
 
 TEST_F(CommonCustomTypesTest, Time) {