Add histograms about files copied or movied files from or to Drive.

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 8fab12d93b81929d9b4c05045b7ebd2b1e6adfcf..a4fd317ba78126ae34fe422e927596c31c5ce50e 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -5791,12 +5791,37 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 
 <histogram name="Drive.CacheDBOpenStatus" enum="DriveCacheDBOpenStatus">
   <obsolete>
-    Deperecated 8/2013.
+    Deprecated 8/2013.
   </obsolete>
   <owner>joshwoodward@google.com</owner>
   <summary>Status of drive cache metadata database open.</summary>
 </histogram>
 
+<histogram name="Drive.CopyBlockedOnJobs">
+  <owner>mtomasz@google.com</owner>
+  <summary>
+    Number of jobs which have to be completed before a newly added copy/move
+    from or to Drive is requested. Temporary histogram for gathering data for
+    crbug.com/229650.
+  </summary>
+</histogram>
+
+<histogram name="Drive.CopyFromDriveFileSizeKB">
+  <owner>mtomasz@google.com</owner>
+  <summary>
+    Sizes of files being copied or moved from Drive to non-Drive. Temporary
+    histogram for gathering data for crbug.com/229650.
+  </summary>
+</histogram>
+
+<histogram name="Drive.CopyToDriveFileSizeKB">
+  <owner>mtomasz@google.com</owner>
+  <summary>
+    Sizes of files being copied from non-Drive to Drive. Temporary histogram for
+    gathering data for crbug.com/229650.
+  </summary>
+</histogram>
+
 <histogram name="Drive.DirectoryFeedLoadTime" units="milliseconds">
   <owner>joshwoodward@google.com</owner>
   <summary>