Claim some histograms.

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 231196dbec0872174bc4f12ea8d1d481d8f6a10c..ca06de882765a77499198f40bea6183f8bc703bd 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -294,52 +294,52 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 
 <histogram name="appcache.CheckResponseResult"
     enum="AppCacheCheckResponseResult">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>AppCache check response result code.</summary>
 </histogram>
 
 <histogram name="appcache.CompletionQueueTime" units="milliseconds">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>
     Time elapsed between a completion task being queued and run.
   </summary>
 </histogram>
 
 <histogram name="appcache.CompletionRunTime" units="milliseconds">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>
     The amount of time taken to run a completion task on the IO thread.
   </summary>
 </histogram>
 
 <histogram name="appcache.CorruptionDetected">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>
     Tracks the number of times corruption is detected in the sql database.
   </summary>
 </histogram>
 
 <histogram name="appcache.InitResult" enum="AppCacheInitResult">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>AppCache initialization result code.</summary>
 </histogram>
 
 <histogram name="appcache.JobStartDelay.AppCache" units="milliseconds">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>
     How long URLRequests to be retrieved from the appcache are delayed.
   </summary>
 </histogram>
 
 <histogram name="appcache.JobStartDelay.Error" units="milliseconds">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>
     How long URLRequests that result in a synthesized error are delayed.
   </summary>
 </histogram>
 
 <histogram name="appcache.JobStartDelay.Network" units="milliseconds">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>
     How long URLRequests to be retrieved over the network are delayed.
   </summary>
@@ -354,12 +354,12 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 
 <histogram name="appcache.MissingManifestDetectedAtCallsite"
     enum="AppCacheErrorSite">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>Identifies where a missing manifest was detected occured.</summary>
 </histogram>
 
 <histogram name="appcache.MissingManifestEntry" enum="BooleanSuccess">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>
     Logged on each occurrence of there being no record for the manifest file in
     the entries table.
@@ -367,7 +367,7 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 </histogram>
 
 <histogram name="appcache.ReinitAttempt">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>
     Tracks the number of times the appcache reinit process occurs. The boolean
     value indicates whether it was a repeated attempt to reinitialize during a
@@ -383,19 +383,19 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 </histogram>
 
 <histogram name="appcache.TaskQueueTime" units="milliseconds">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>
     Time elapsed between a background task being queued and run.
   </summary>
 </histogram>
 
 <histogram name="appcache.TaskRunTime" units="milliseconds">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>The amount of time taken to run a background task.</summary>
 </histogram>
 
 <histogram name="appcache.UpdateJobResult" enum="AppCacheUpdateJobResult">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
   <summary>AppCache update job result code.</summary>
 </histogram>
 
@@ -4159,11 +4159,213 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="DiskCache.3.AsyncIOTime" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The time for an async IO operation to complete. This covers content Writes
+    and Reads, measured from the cache thread. AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.AsyncReadDispatchTime" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>The synchronous portion of an async read. AppCache.</summary>
+</histogram>
+
+<histogram name="DiskCache.3.AsyncWriteDispatchTime" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>The synchronous portion of an async write. AppCache.</summary>
+</histogram>
+
+<histogram name="DiskCache.3.AverageOpenEntries2">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The average number of open disk cache entries at any given time. AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.BufferBytes" units="KB">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>The total size of all the internal buffers. AppCache.</summary>
+</histogram>
+
+<histogram name="DiskCache.3.ByteIORate" units="KB">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The number of KB accessed from the cache in a 30 seconds interval. AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.CreateTime" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>The time spent creating a new entry on the cache. AppCache.</summary>
+</histogram>
+
+<histogram name="DiskCache.3.DeleteData" units="bytes">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The size of the data portion of a given entry by the time it is deleted.
+    AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.DeleteFailed">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    Number of external files that we were unable to delete. AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.DeleteHeader" units="bytes">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The size of the HTML headers of a given entry by the time it is deleted.
+    AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.Entries">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The number of entries currently stored on the cache. AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.EntriesFull">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The number of entries currently stored on the cache, after it is full.
+    AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.EntryAccessRate">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The number of entries accessed by the cache in a 30 seconds interval.
+    AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.Error" enum="DiskCacheError">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>Critical error ids. AppCache.</summary>
+</histogram>
+
 <histogram name="DiskCache.3.FilesAge" units="hours">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
   <summary>The age of the cache's files (wall time). AppCache.</summary>
 </histogram>
 
+<histogram name="DiskCache.3.GetRankings" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The time spent reading the LRU-related portion of an entry. AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.HitRatioBySize2" units="MB">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The hit ratio for each size. To calculate the hit ratio of caches of a
+    certain size, take the ratio of a bin in this histogram to the same bin in
+    DiskCache.3.Size2. AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.KeySize" units="bytes">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>The size of each key. AppCache.</summary>
+</histogram>
+
+<histogram name="DiskCache.3.MaxOpenEntries2">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The maximum number of simultaneously open disk cache entries. AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.MaxSize2" units="MB">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>The maximum size of the cache. AppCache.</summary>
+</histogram>
+
+<histogram name="DiskCache.3.OpenTime" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The time spent opening an entry already on the cache (cache hit). AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.PendingIO">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>The number of pending IO operations (Async IO). AppCache.</summary>
+</histogram>
+
+<histogram name="DiskCache.3.ReadTime" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>The time spent reading from an entry. AppCache.</summary>
+</histogram>
+
+<histogram name="DiskCache.3.Size" units="MB">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>The current size of the cache. AppCache.</summary>
+</histogram>
+
+<histogram name="DiskCache.3.TotalIOTime" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The total time it takes to perform a payload IO operation (AKA, directed to
+    an entry). This is measured from the IO thread. AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.TotalTime" units="hours">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>Number of hours that the cache has been used. AppCache.</summary>
+</histogram>
+
+<histogram name="DiskCache.3.UsedSpace" units="%">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>
+    The percentage of the allowed disk space that we are currently using.
+    AppCache.
+  </summary>
+</histogram>
+
+<histogram name="DiskCache.3.WriteTime" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <owner>rvargas@chromium.org</owner>
+  <summary>The time spent writing to an entry. AppCache.</summary>
+</histogram>
+
 <histogram name="DiskCache.4.FilesAge" units="hours">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <summary>The age of the cache's files (wall time). ShaderCache.</summary>
@@ -5005,6 +5207,49 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="DOMStorage.clear" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <summary>
+    Duration to execute localStorage.clear() or sessionStorage.clear().
+  </summary>
+</histogram>
+
+<histogram name="DOMStorage.getItem" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <summary>
+    Duration to execute localStorage.getItem() or sessionStorage.getItem().
+  </summary>
+</histogram>
+
+<histogram name="DOMStorage.key" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <summary>
+    Duration to execute localStorage.key() or sessionStorage.key().
+  </summary>
+</histogram>
+
+<histogram name="DOMStorage.length" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <summary>
+    Duration to execute localStorage.length() or sessionStorage.length().
+  </summary>
+</histogram>
+
+<histogram name="DOMStorage.removeItem" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <summary>
+    Duration to execute localStorage.removeItem() or
+    sessionStorage.removeItem().
+  </summary>
+</histogram>
+
+<histogram name="DOMStorage.setItem" units="milliseconds">
+  <owner>michaeln@chromium.org</owner>
+  <summary>
+    Duration to execute localStorage.setItem() or sessionStorage.setItem().
+  </summary>
+</histogram>
+
 <histogram name="Download.AcceptRangesBytes.KBytes" units="KB">
   <owner>asanka@chromium.org</owner>
   <summary>The length of downloads for serves that accept byte ranges.</summary>
@@ -10687,6 +10932,42 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <summary>Records events related to local discovery notifications.</summary>
 </histogram>
 
+<histogram name="LocalStorage.BrowserLocalStorageSizeInKB" units="KB">
+  <owner>michaeln@chromium.org</owner>
+  <summary>
+    Size of the HTML5 LocalStorage DB in KB in the browser-side cache.
+  </summary>
+</histogram>
+
+<histogram name="LocalStorage.BrowserTimeToPrimeLocalStorage">
+  <owner>michaeln@chromium.org</owner>
+  <summary>
+    Time to load HTML5 LocalStorage into the browser-side cache.
+  </summary>
+</histogram>
+
+<histogram name="LocalStorage.RendererLocalStorageSizeInKB" units="KB">
+  <owner>michaeln@chromium.org</owner>
+  <summary>
+    Size of the HTML5 LocalStorage DB in KB in the renderer-side cache.
+  </summary>
+</histogram>
+
+<histogram name="LocalStorage.RendererTimeToPrimeLocalStorage">
+  <owner>michaeln@chromium.org</owner>
+  <summary>
+    Time to load HTML5 LocalStorage into the renderer-side cache.
+  </summary>
+</histogram>
+
+<histogram name="LocalStorage.TimeToPrimeLocalStorage">
+  <owner>michaeln@chromium.org</owner>
+  <summary>
+    Time to load HTML5 LocalStorage into the renderer-side cache. Note that the
+    name is not 'Renderer' prefixed for continuity with the old naming.
+  </summary>
+</histogram>
+
 <histogram name="Login.ConsumerNewUsersAllowed" enum="LoginConsumerWhitelist">
   <owner>cmasone@chromium.org</owner>
   <owner>sumit@chromium.org</owner>
@@ -28367,6 +28648,14 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <summary>How did the user interact with the SessionCrashed Bubble?</summary>
 </histogram>
 
+<histogram name="SessionStorageDatabase.Open" enum="SessionStorageDatabaseOpen">
+  <owner>michaeln@chromium.org</owner>
+  <summary>
+    The result (success, failure, or database recreated) of trying to open the
+    LevelDB database for sessionStorage.
+  </summary>
+</histogram>
+
 <histogram name="Settings.DefaultSearchProvider" enum="OmniboxSearchEngine">
   <obsolete>
     Deprecated in Chrome 30.  Use Search.DefaultSearchProviderType instead.
@@ -38612,6 +38901,26 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="3" label="Primary accounts present but different"/>
 </enum>
 
+<enum name="DiskCacheError" type="int">
+  <summary>Error codes defined in net/disk_cache/errors.h</summary>
+  <int value="0" label="OK"/>
+  <int value="1" label="Init failed"/>
+  <int value="2" label="Invalid tail (corrupt list)"/>
+  <int value="3" label="Invalid head (corrupt list)"/>
+  <int value="4" label="Invalid prev (corrupt list link)"/>
+  <int value="5" label="Invalid next (corrupt list link)"/>
+  <int value="6" label="Invalid entry (beyond dirty)"/>
+  <int value="7" label="Invalid address (single entry)"/>
+  <int value="8" label="Invalid links (single entry)"/>
+  <int value="9" label="Number of entries mistmatch"/>
+  <int value="10" label="Read failure (single entry)"/>
+  <int value="11" label="Previous crash (Destructor not called)"/>
+  <int value="12" label="Storage error (Unable to open / create main files)"/>
+  <int value="13" label="Invalid mask (corrupt header)"/>
+  <int value="14" label="Cache cleared (user request)"/>
+  <int value="15" label="Cache created (from empty files)"/>
+</enum>
+
 <enum name="DllHash" type="int">
 <!-- Generated by chrome_elf/dll_hash/dll_hash_main.cc -->
 
@@ -48854,6 +49163,16 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="3" label="Specified URLs"/>
 </enum>
 
+<enum name="SessionStorageDatabaseOpen" type="int">
+  <int value="0" label="OK">Succesfully opened the database.</int>
+  <int value="1" label="Recovered">
+    Failed to open the existing db, deleted it, and created a new empty db.
+  </int>
+  <int value="2" label="Total Fail">
+    Failed to open the database and also failed to delete and start over.
+  </int>
+</enum>
+
 <enum name="ShelfAlignmentValue" type="int">
   <summary>
     The alignment of the shelf area (see ash/launcher/launcher_view.cc).
@@ -48872,6 +49191,12 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="1" label="Failure"/>
 </enum>
 
+<enum name="ShortReportReason" type="int">
+  <int value="1" label="No create time"/>
+  <int value="2" label="Not full"/>
+  <int value="3" label="Not full and no create time"/>
+</enum>
+
 <enum name="ShutdownReason" type="int">
   <summary>
     The reason that the Chrome OS power manager shut down or rebooted the
@@ -52191,6 +52516,14 @@ To add a new entry, add it with any value and run test to compute valid value.
   <affected-histogram name="LevelDBEnv.TimeTo"/>
 </histogram_suffixes>
 
+<histogram_suffixes name="LocalStorageSizes" separator="">
+  <suffix name="Under100KB" label="DB size under 100KB"/>
+  <suffix name="100KBTo1MB" label="DB size between 100KB and 1MB"/>
+  <suffix name="1MBTo5MB" label="DB size between 1MB and 5MB"/>
+  <affected-histogram name="LocalStorage.BrowserTimeToPrimeLocalStorage"/>
+  <affected-histogram name="LocalStorage.RendererTimeToPrimeLocalStorage"/>
+</histogram_suffixes>
+
 <histogram_suffixes name="MediaAudioInputControllerTime" separator=".">
   <suffix name="CloseTime" label="Measures the time taken for DoClose()."/>
   <suffix name="CreateTime" label="Measures the time taken for DoCreate()."/>