metrics: Wrap leak detector sources in Chrome OS condition

components/metrics.gypi

Index: components/metrics.gypi
diff --git a/components/metrics.gypi b/components/metrics.gypi
index 99db04919f0e6dc613eae704fc6102f85b2c2e88..11dbb4db8d87462971ff24fde59823a1c8ffe4d3 100644
--- a/components/metrics.gypi
+++ b/components/metrics.gypi
@@ -104,29 +104,6 @@
       ],
     },
     {
-      'target_name': 'metrics_leak_detector',
-      'type': 'static_library',
-      'dependencies': [
-        '../base/base.gyp:base',
-      ],
-      'sources': [
-        'metrics/leak_detector/call_stack_manager.cc',
-        'metrics/leak_detector/call_stack_manager.h',
-        'metrics/leak_detector/call_stack_table.cc',
-        'metrics/leak_detector/call_stack_table.h',
-        'metrics/leak_detector/custom_allocator.cc',
-        'metrics/leak_detector/custom_allocator.h',
-        'metrics/leak_detector/leak_analyzer.cc',
-        'metrics/leak_detector/leak_analyzer.h',
-        'metrics/leak_detector/leak_detector_impl.cc',
-        'metrics/leak_detector/leak_detector_impl.h',
-        'metrics/leak_detector/leak_detector_value_type.cc',
-        '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',
@@ -265,6 +242,34 @@
         },
       ],
     }],
+    ['chromeos==1', {
+      'targets': [
+        {
+          # GN version: //components/metrics:leak_detector
+          'target_name': 'metrics_leak_detector',
+          'type': 'static_library',
+          'dependencies': [
+            '../base/base.gyp:base',
+          ],
+          'sources': [
+            'metrics/leak_detector/call_stack_manager.cc',
+            'metrics/leak_detector/call_stack_manager.h',
+            'metrics/leak_detector/call_stack_table.cc',
+            'metrics/leak_detector/call_stack_table.h',
+            'metrics/leak_detector/custom_allocator.cc',
+            'metrics/leak_detector/custom_allocator.h',
+            'metrics/leak_detector/leak_analyzer.cc',
+            'metrics/leak_detector/leak_analyzer.h',
+            'metrics/leak_detector/leak_detector_impl.cc',
+            'metrics/leak_detector/leak_detector_impl.h',
+            'metrics/leak_detector/leak_detector_value_type.cc',
+            'metrics/leak_detector/leak_detector_value_type.h',
+            'metrics/leak_detector/ranked_list.cc',
+            'metrics/leak_detector/ranked_list.h',
+          ],
+        },
+      ],
+    }],
     ['OS!="ios"', {
       'targets': [
         {