Revert 233460 "Prefer opening PDF downloads in the browser."

trunk/src/tools/metrics/histograms/histograms.xml

Index: trunk/src/tools/metrics/histograms/histograms.xml
===================================================================
--- trunk/src/tools/metrics/histograms/histograms.xml	(revision 233496)
+++ trunk/src/tools/metrics/histograms/histograms.xml	(working copy)
@@ -3060,14 +3060,6 @@
   </summary>
 </histogram>
 
-<histogram name="Download.OpenMethod" enum="DownloadOpenMethod">
-  <summary>
-    Invocation count for methods of opening a download. For some file types,
-    Chrome defaults to opening the file in the browser instead of invoking the
-    system handler. The user has the option of overriding this behavior.
-  </summary>
-</histogram>
-
 <histogram name="Download.OpensOutstanding">
   <summary>The number of unopened downloads, when one is opened.</summary>
 </histogram>
@@ -21417,12 +21409,6 @@
   <int value="8" label="POTENTIALLY_UNWANTED"/>
 </enum>
 
-<enum name="DownloadOpenMethod" type="int">
-  <int value="0" label="Opened with plaform handler by default"/>
-  <int value="1" label="Opened in browser by default"/>
-  <int value="2" label="Opened with plaform handler by user choice"/>
-</enum>
-
 <enum name="DownloadSavePackageEvent" type="int">
   <int value="0" label="Started"/>
   <int value="1" label="Cancelled"/>