[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..c019d38c2204a4b7796e153073d413c580a01cd3 100644
--- a/mojo/common/common_custom_types_unittest.cc
+++ b/mojo/common/common_custom_types_unittest.cc
@@ -7,6 +7,7 @@
 #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"
@@ -32,6 +33,11 @@ struct PassTraits {
 };
 
 template <>
+struct PassTraits<base::ProcessId> {
+  using Type = base::ProcessId;
+};
+
+template <>
 struct PassTraits<base::Time> {
   using Type = base::Time;
 };
@@ -91,6 +97,21 @@ class TestUnguessableTokenImpl : public TestUnguessableToken {
   mojo::Binding<TestUnguessableToken> binding_;
 };
 
+class TestProcessIdImpl : public TestProcessId {
+ public:
+  explicit TestProcessIdImpl(TestProcessIdRequest request)
+      : binding_(this, std::move(request)) {}
+
+  // TestProcessId implementation:
+  void BounceProcessId(base::ProcessId in,
+                       const BounceProcessIdCallback& callback) override {
+    callback.Run(in);
+  }
+
+ private:
+  mojo::Binding<TestProcessId> binding_;
+};
+
 class TestTimeImpl : public TestTime {
  public:
   explicit TestTimeImpl(TestTimeRequest request)
@@ -226,6 +247,19 @@ TEST_F(CommonCustomTypesTest, UnguessableToken) {
   run_loop.Run();
 }
 
+TEST_F(CommonCustomTypesTest, ProcessId) {
+  base::RunLoop run_loop;
+
+  TestProcessIdPtr ptr;
+  TestProcessIdImpl impl(MakeRequest(&ptr));
+
+  base::ProcessId pid = base::GetCurrentProcId();
+
+  ptr->BounceProcessId(pid, ExpectResponse(&pid, run_loop.QuitClosure()));
+
+  run_loop.Run();
+}
+
 TEST_F(CommonCustomTypesTest, Time) {
   base::RunLoop run_loop;