components/metrics: Add runtime memory leak detector

components/metrics.gypi

Index: components/metrics.gypi
diff --git a/components/metrics.gypi b/components/metrics.gypi
index e2e1c49b701ceb67d40986f493b7f184da6036cd..88984bdcd181fb988c90fce9c2b6b4d14444f1d7 100644
--- a/components/metrics.gypi
+++ b/components/metrics.gypi
@@ -80,6 +80,11 @@
             'metrics/machine_id_provider_stub.cc',
           ],
         }],
+        ['enable_leak_detector==1 and chromeos==1', {
+          'dependencies': [
+            'metrics_leak_detector',
+          ],
+        }],
       ],
     },
     {
@@ -102,6 +107,32 @@
       ],
     },
     {
+      'target_name': 'metrics_leak_detector',
+      'type': 'static_library',
+      'include_dirs': [
+        # In these modules, the tcmalloc include path does not take precendence
+        # over the top-level chromium path.
+        '..',
+        '../third_party/tcmalloc/chromium/src',
+      ],
+      'dependencies': [
+        '../base/base.gyp:base',
+        '../base/allocator/allocator.gyp:allocator',
+      ],
+      'sources': [
+        'metrics/leak_detector/call_stack_table.cc',
+        'metrics/leak_detector/call_stack_table.h',
+        'metrics/leak_detector/leak_analyzer.cc',
+        'metrics/leak_detector/leak_analyzer.h',
+        'metrics/leak_detector/leak_detector.cc',
+        'metrics/leak_detector/leak_detector_impl.cc',
+        'metrics/leak_detector/leak_detector_impl.h',
+        'metrics/leak_detector/leak_detector_value_type.h',
+        'metrics/leak_detector/ranked_list.cc',
+        'metrics/leak_detector/ranked_list.h',
+      ],
+    },
+    {
       # GN version: //components/metrics:net
       'target_name': 'metrics_net',
       'type': 'static_library',