RAPPOR implementation

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 34974cf587c29f28ada5108773eaba27ac7eaa34..6fba515d5d3b086238f053a680e2b9a98ae23b6d 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -16131,6 +16131,19 @@ other types of suffix sets.
   </summary>
 </histogram>
 
+<histogram name="Rappor.DiscardReason" enum="RapporDiscardReason">
+  <summary>
+    For each Rappor log that is discarded, the reason that it was discarded.
+  </summary>
+</histogram>
+
+<histogram name="Rappor.UploadResponseCode" enum="HttpResponseCode">
+  <summary>
+    For each upload to the Rappor server, log the response received from the
+    server.
+  </summary>
+</histogram>
+
 <histogram name="Renderer.AcceleratedFixedRootBackground"
     enum="AcceleratedFixedRootBackground">
   <summary>
@@ -30726,6 +30739,12 @@ other types of suffix sets.
   <int value="6" label="CANCELLED"/>
 </enum>
 
+<enum name="RapporDiscardReason" type="int">
+  <int value="0" label="Upload Success"/>
+  <int value="1" label="Upload Rejected"/>
+  <int value="2" label="Queue Overflowed"/>
+</enum>
+
 <enum name="RecentTabsAction" type="int">
   <int value="0" label="Local Session Tab"/>
   <int value="1" label="Other Device Tab"/>