Create a histogram serialization mechanism in components/metrics

components/metrics.gypi

Index: components/metrics.gypi
diff --git a/components/metrics.gypi b/components/metrics.gypi
index 6036cae0cf91e3ef123fbdb65ffb35b7a63ebd35..95f2832ca6e2e07b4d907ff61ae95419880bb951 100644
--- a/components/metrics.gypi
+++ b/components/metrics.gypi
@@ -17,6 +17,37 @@
         'metrics/metrics_hashes.cc',
         'metrics/metrics_hashes.h',
       ],
+      'conditions': [
+        ['chromeos==1', {
+          'dependencies': [
+            'metrics_export',
+            ],
+          },
+        ],
+      ],
     },
-  ],
+    {
+      'target_name': 'metrics_export',
+      'type': 'static_library',
+      'sources':[
+        'metrics/chromeos/crash_sample.cc',
+        'metrics/chromeos/crash_sample.h',
+        'metrics/chromeos/histogram_sample.cc',
+        'metrics/chromeos/histogram_sample.h',
+        'metrics/chromeos/linearhistogram_sample.cc',

[Luigi Semenzato, 2014/05/08 17:19:37]

Whoa, that's a lot of small files/classes.

+        'metrics/chromeos/linearhistogram_sample.h',
+        'metrics/chromeos/metrics_utils.cc',
+        'metrics/chromeos/metrics_utils.h',
+        'metrics/chromeos/metric_sample.cc',
+        'metrics/chromeos/metric_sample.h',
+        'metrics/chromeos/sparsehistogram_sample.cc',
+        'metrics/chromeos/sparsehistogram_sample.h',
+        'metrics/chromeos/useraction_sample.cc',
+        'metrics/chromeos/useraction_sample.h',
+        ],
+      'dependencies': [
+        '../base/base.gyp:base',
+        ],
+      },
+    ],
 }