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

mojo/common/test_common_custom_types.mojom

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 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";
 import "mojo/common/unguessable_token.mojom";
 import "mojo/common/values.mojom";
 
 interface TestFilePath {
   BounceFilePath(mojo.common.mojom.FilePath in)
       => (mojo.common.mojom.FilePath out);
 };
 
 interface TestUnguessableToken {
   BounceNonce(mojo.common.mojom.UnguessableToken in)
       => (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)
       => (mojo.common.mojom.TimeDelta time_delta);
   BounceTimeTicks(mojo.common.mojom.TimeTicks time_ticks)
       => (mojo.common.mojom.TimeTicks time_ticks);
 };
 
 interface TestValue {
   [Sync]
@@ skipping 17 matching lines @@
   [Sync]
   BounceFile(mojo.common.mojom.File? in)
       => (mojo.common.mojom.File? out);
 };
 
 interface TestTextDirection {
   [Sync]
   BounceTextDirection(mojo.common.mojom.TextDirection in)
       => (mojo.common.mojom.TextDirection out);
 };