mac: Remove the unused UMA histogram OSX.CatSixtyFour.

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 4d36619ab5c661fca1ebe7526473152b376d5933..8765d3fd6b583e6d03c7872191a84b90e63cced8 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -24157,11 +24157,6 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
-<histogram name="OSX.CatSixtyFour" enum="CatSixtyFour">
-  <owner>mark@chromium.org</owner>
-  <summary>The cat's flavor and how many bits there are in it.</summary>
-</histogram>

[Ilya Sherman, 2015/03/25 20:31:35]

Please mark this as <obsolete instead.

-
 <histogram name="OSX.ExceptionHandlerEvents" enum="OSXExceptionHandlerEvents">
   <owner>mark@chromium.org</owner>
   <summary>Events seen by the OSX NSException swizzle.</summary>
@@ -45641,30 +45636,6 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="3" label="DEFAULT_PLAYER_FAILURE"/>
 </enum>
 
-<enum name="CatSixtyFour" type="int">
-  <int value="0" label="Saber-Toothed Cat (&lt;10.6), 32-bit (?)"/>
-  <int value="1" label="Saber-Toothed Cat (&lt;10.6), 64-bit (?)"/>
-  <int value="2" label="Snow Leopard (10.6), 32-bit"/>
-  <int value="3" label="Snow Leopard (10.6), 64-bit"/>
-  <int value="4" label="Lion (10.7), 32-bit (?)"/>
-  <int value="5" label="Lion (10.7), 64-bit"/>
-  <int value="6" label="Mountain Lion (10.8), 32-bit (?)"/>
-  <int value="7" label="Mountain Lion (10.8), 64-bit"/>
-  <int value="8" label="Mavericks (10.9), 32-bit (?)"/>
-  <int value="9" label="Mavericks (10.9), 64-bit"/>
-  <int value="10" label="Saber-Toothed Cat (&lt;10.6), 8-bit (?)"/>
-  <int value="11" label="Snow Leopard (10.6), 8-bit (?)"/>
-  <int value="12" label="Lion (10.7), 8-bit (?)"/>
-  <int value="13" label="Mountain Lion (10.8), 8-bit (?)"/>
-  <int value="14" label="Mavericks (10.9), 8-bit (?)"/>
-  <int value="15" label="Yosemite (10.10), 32-bit (?)"/>
-  <int value="16" label="Yosemite (10.10), 64-bit"/>
-  <int value="17" label="Yosemite (10.10), 8-bit (?)"/>
-  <int value="18" label="FutureCat (&gt;10.10), 32-bit (?)"/>
-  <int value="19" label="FutureCat (&gt;10.10), 64-bit"/>
-  <int value="20" label="FutureCat (&gt;10.10), 8-bit (?)"/>
-</enum>
-
 <enum name="CdmPromiseResult" type="int">
   <int value="0" label="Success"/>
   <int value="1" label="NotSupportedError"/>