Add file types to FileBrowser.ViewingFileType UMA stat.

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 57cf2870374239a36267d9e56c954da44c72c716..85cbe596ebe91a2d33044c02f1dd5b681a08fb25 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -51361,6 +51361,17 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="46" label=".wmv"/>
   <int value="47" label=".xls"/>
   <int value="48" label=".xlsx"/>
+  <int value="49" label=".crdownload"/>
+  <int value="50" label=".crx"/>
+  <int value="51" label=".dmg"/>
+  <int value="52" label=".exe"/>
+  <int value="53" label=".html"/>
+  <int value="54" label=".htm"/>
+  <int value="55" label=".jar"/>
+  <int value="56" label=".ps"/>
+  <int value="57" label=".torrent"/>
+  <int value="58" label=".txt"/>
+  <int value="59" label=".zip"/>
 </enum>
 
 <enum name="VPNDriver" type="int">