QUIC - track the open and close states of disk cache entries of

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 fa0f0b9357fec88badb464c824e63b5c217b5407..9ba4cecc9cf14d416b822ba6f78f9027bce6fd9e 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -16818,6 +16818,11 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Net.QuicDiskCache.EntryState" enum="QuicDiskCacheEntryState">
+  <owner>rtenneti@chromium.org</owner>
+  <summary>Tracks the open and close state of the disk cache entry.</summary>
+</histogram>
+
 <histogram name="Net.QuicEphemeralPortsSuggested">
   <owner>rch@chromium.org</owner>
   <summary>The number of ports suggested per server.</summary>
@@ -49736,6 +49741,11 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="7" label="Address and port match: IPv6 IPv6"/>
 </enum>
 
+<enum name="QuicDiskCacheEntryState" type="int">
+  <int value="0" label="QUIC_DISK_CACHE_ENTRY_OPENED"/>

[Ryan Hamilton, 2014/09/30 22:39:33]

nit: consider making the labels simply "OPENED" and "CLOSED"

[ramant (doing other things), 2014/09/30 22:41:58]

Done.

+  <int value="1" label="QUIC_DISK_CACHE_ENTRY_CLOSED"/>
+</enum>
+
 <enum name="QuicErrorCodes" type="int">
   <int value="0" label="NO_ERROR"/>
   <int value="1" label="INTERNAL_ERROR"/>