Create feature and enable data collection for Data Saver site breakdown

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 18ec5e60d2720b284088f37d63fa53619511590e..ded103ac2cdb149915a7da7c1a0e323089d85d1c 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -100579,6 +100579,7 @@ from previous Chrome versions.
   <int value="-918618075" label="enable-service-worker"/>
   <int value="-914210146" label="enable-web-based-signin"/>
   <int value="-912456561" label="MidiManagerWinrt:enabled"/>
+  <int value="-909641013" label="DataReductionProxySiteBreakdown:enabled"/>
   <int value="-908421850" label="PointerEvent:enabled"/>
   <int value="-907234795" label="NewAudioRenderingMixingStrategy:disabled"/>
   <int value="-899334103" label="disable-fast-text-autosizing"/>
@@ -100944,6 +100945,7 @@ from previous Chrome versions.
   <int value="637396292" label="AllBookmarks:enabled"/>
   <int value="643725031" label="disable-touch-feedback"/>
   <int value="644189071" label="PermissionsBlacklist:enabled"/>
+  <int value="644674603" label="DataReductionProxySiteBreakdown:disabled"/>
   <int value="646252875" label="ReadItLaterInMenu:enabled"/>
   <int value="646738320" label="disable-gesture-editing"/>
   <int value="650602639" label="enable-autofill-keyboard-accessory-view"/>