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

mojo/common/test_common_custom_types.mojom

Index: mojo/common/test_common_custom_types.mojom
diff --git a/mojo/common/test_common_custom_types.mojom b/mojo/common/test_common_custom_types.mojom
index 0f13680f6827c771b65a15129d944132d7166856..7a7ab145802a78ee043147625712a96af3e2e3dc 100644
--- a/mojo/common/test_common_custom_types.mojom
+++ b/mojo/common/test_common_custom_types.mojom
@@ -6,6 +6,7 @@ module mojo.common.test;
 
 import "mojo/common/file.mojom";
 import "mojo/common/file_path.mojom";
+import "mojo/common/process_id.mojom";
 import "mojo/common/string16.mojom";
 import "mojo/common/text_direction.mojom";
 import "mojo/common/time.mojom";
@@ -22,6 +23,11 @@ interface TestUnguessableToken {
       => (mojo.common.mojom.UnguessableToken out);
 };
 
+interface TestProcessId {

[Ken Rockot(use gerrit already), 2017/04/18 22:11:25]

Please avoid copying this pattern for testing new typemaps. Please see
https://groups.google.com/a/chromium.org/forum/#!topic/chromium-mojo/_m5qIDZgAf8
- TLDR is you can just directly Serialize and Deserialize a base::ProcessId
to/from a mojo::common::mojom::ProcessId without using a new mojom interface.

[fmeawad, 2017/04/19 21:07:21]

Done.

+  BounceProcessId(mojo.common.mojom.ProcessId in)
+      => (mojo.common.mojom.ProcessId out);
+};
+
 interface TestTime {
   BounceTime(mojo.common.mojom.Time time) => (mojo.common.mojom.Time time);
   BounceTimeDelta(mojo.common.mojom.TimeDelta time_delta)