Merge 208622 "Histogram OS-level errors along with the method th..."

> Histogram OS-level errors along with the method that encountered them.
> 
> This is a follow-up to r206925 /
> https://chromiumcodereview.appspot.com/16703013. Now that we
> have an idea of which methods generate errors, add a
> histogram per method and log the exact error encountered.
> 
> Test locally by making some stdio and ::base calls appear to
> fail, then checking chrome://histograms/IndexedDB
> 
> BUG=239880
> 
> Review URL: https://chromiumcodereview.appspot.com/17551011

TBR=dgrogan@chromium.org

Review URL: https://codereview.chromium.org/18445002

git-svn-id: svn://svn.chromium.org/chrome/branches/1547/src@209564 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 62 insertions, 0 deletions

diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 395e50d..ef42062 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -11930,6 +11930,22 @@ other types of suffix sets.
   </summary>
 </histogram>
 
+<histogram name="WebCore.IndexedDB.LevelDBOpenErrors.Errno"
+    enum="OSAgnosticErrno">
+  <summary>
+    Errno errors encountered by a single LevelDBEnv method when opening an
+    IndexedDB instance.
+  </summary>
+</histogram>
+
+<histogram name="WebCore.IndexedDB.LevelDBOpenErrors.PFE"
+    enum="PlatformFileError">
+  <summary>
+    PlatformFileErrors encountered by a single LevelDBEnv method when opening an
+    IndexedDB instance.
+  </summary>
+</histogram>
+
 <histogram name="WebCore.IndexedDB.LevelDBWriteErrors" enum="LevelDBErrorTypes">
   <summary>
     Error classes returned by LevelDB when it failed to write to a database.
@@ -11943,6 +11959,22 @@ other types of suffix sets.
   </summary>
 </histogram>
 
+<histogram name="WebCore.IndexedDB.LevelDBWriteErrors.Errno"
+    enum="OSAgnosticErrno">
+  <summary>
+    Errno errors encountered by a single LevelDBEnv method when writing to an
+    IndexedDB instance.
+  </summary>
+</histogram>
+
+<histogram name="WebCore.IndexedDB.LevelDBWriteErrors.PFE"
+    enum="PlatformFileError">
+  <summary>
+    PlatformFileErrors encountered by a single LevelDBEnv method when writing to
+    an IndexedDB instance.
+  </summary>
+</histogram>
+
 <histogram name="WebCore.V8DOMWindowShell.createContext.IsolatedWorld"
     units="milliseconds">
   <summary>
@@ -18777,6 +18809,36 @@ other types of suffix sets.
   <affected-histogram name="NetConnectivity.Pipeline.Success"/>
 </fieldtrial>
 
+<fieldtrial name="IndexedDBLevelDBErrnoMethods" separator=".">
+  <group name="NewLogger" label="ChromiumEnv::NewLogger"/>
+  <group name="NewSequentialFile" label="ChromiumEnv::NewSequentialFile"/>
+  <group name="NewWritableFile" label="ChromiumEnv::NewWritableFile"/>
+  <group name="SequentialFileRead" label="ChromiumSequentialFile::Read"/>
+  <group name="SequentialFileSkip" label="ChromiumSequentialFile::Skip"/>
+  <group name="WritableFileAppend" label="ChromiumWritableFile::Append"/>
+  <group name="WritableFileClose" label="ChromiumWritableFile::Close"/>
+  <group name="WritableFileFlush" label="ChromiumWritableFile::Flush"/>
+  <group name="WritableFileSync" label="ChromiumWritableFile::Sync"/>
+  <group name="WritableFileSyncParent"
+      label="ChromiumWritableFile::SyncParent"/>
+  <affected-histogram name="WebCore.IndexedDB.LevelDBOpenErrors.Errno"/>
+  <affected-histogram name="WebCore.IndexedDB.LevelDBWriteErrors.Errno"/>
+</fieldtrial>
+
+<fieldtrial name="IndexedDBLevelDBPFEMethods" separator=".">
+  <group name="CreateDir" label="ChromiumEnv::CreateDir"/>
+  <group name="DeleteDir" label="ChromiumEnv::DeleteDir"/>
+  <group name="DeleteFile" label="ChromiumEnv::DeleteFile"/>
+  <group name="GetFileSize" label="ChromiumEnv::GetFileSize"/>
+  <group name="LockFile" label="ChromiumEnv::LockFile"/>
+  <group name="NewRandomAccessFile" label="ChromiumEnv::NewRandomAccessFile"/>
+  <group name="RandomAccessFileRead" label="ChromiumRandomAccessFile::Read"/>
+  <group name="RenameFile" label="ChromiumEnv::RenameFile"/>
+  <group name="UnlockFile" label="ChromiumEnv::UnlockFile"/>
+  <affected-histogram name="WebCore.IndexedDB.LevelDBOpenErrors.PFE"/>
+  <affected-histogram name="WebCore.IndexedDB.LevelDBWriteErrors.PFE"/>
+</fieldtrial>
+
 <fieldtrial name="InstallerDownloadSources" separator="">
   <group name="HttpServer" label="Download Source: HTTP Server"/>
   <group name="HttpsServer" label="Download Source: HTTPS Server"/>