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 6446d031a849225eadfe9606352758f9ef6b108a..5b150c362fd6628a0a7e82cf20dc73a3420a2bfd 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -5871,7 +5871,7 @@ 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>
@@ -5885,6 +5885,14 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Drive.DownloadFromDriveFileSize" units="KB">
+  <owner>mtomasz@chromium.org</owner>
+  <summary>
+    Sizes of files being downloaded from Drive. Temporary histogram for
+    gathering data for http://crbug.com/229650.
+  </summary>
+</histogram>
+
 <histogram name="Drive.EntireFeedLoadTime" units="microseconds">
   <obsolete>
     Deprecated 12/2013 due to the UMA stat bucket layout change. We'll use
@@ -6031,6 +6039,23 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Drive.TransferBlockedOnJobs" units="jobs">
+  <owner>mtomasz@chromium.org</owner>
+  <summary>
+    Number of jobs which have to be completed before a newly added download or
+    download from or to Drive is requested. Temporary histogram for gathering
+    data for http://crbug.com/229650.
+  </summary>
+</histogram>
+
+<histogram name="Drive.UploadToDriveFileSize" units="KB">
+  <owner>mtomasz@chromium.org</owner>
+  <summary>
+    Sizes of files being uploaded to Drive. Temporary histogram for gathering
+    data for http://crbug.com/229650.
+  </summary>
+</histogram>
+
 <histogram name="DriveOffline.CrosAutoEnableOutcome"
     enum="CrosEnableDriveOfflineOutcome">
   <owner>joshwoodward@google.com</owner>