Add UMA to see how many times HasIsolatedOrigin origin has more than one origin

webkit/browser/fileapi/obfuscated_file_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "webkit/browser/fileapi/obfuscated_file_util.h"
 
 #include <queue>
 #include <string>
 #include <vector>
 
 #include "base/file_util.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
+#include "base/metrics/histogram.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "url/gurl.h"
 #include "webkit/browser/fileapi/file_observers.h"
 #include "webkit/browser/fileapi/file_system_context.h"
 #include "webkit/browser/fileapi/file_system_operation_context.h"
@@ skipping 67 matching lines @@
 void TouchDirectory(SandboxDirectoryDatabase* db, FileId dir_id) {
   DCHECK(db);
   if (!db->UpdateModificationTime(dir_id, base::Time::Now()))
     NOTREACHED();
 }
 
 const base::FilePath::CharType kTemporaryDirectoryName[] = FILE_PATH_LITERAL("t");
 const base::FilePath::CharType kPersistentDirectoryName[] = FILE_PATH_LITERAL("p");
 const base::FilePath::CharType kSyncableDirectoryName[] = FILE_PATH_LITERAL("s");
 
+enum IsolatedOriginStatus {
+  kIsolatedOriginMatch,
+  kIsolatedOriginDontMatch,
+  kIsolatedOriginStatusMax,
+};
+
 }  // namespace
 
 using base::PlatformFile;
 using base::PlatformFileError;
 
 class ObfuscatedFileEnumerator
     : public FileSystemFileUtil::AbstractFileEnumerator {
  public:
   ObfuscatedFileEnumerator(
       SandboxDirectoryDatabase* db,
@@ skipping 1317 matching lines @@
   return error;
 }
 
 bool ObfuscatedFileUtil::HasIsolatedStorage(const GURL& origin) {
   if (special_storage_policy_.get() &&
       special_storage_policy_->HasIsolatedStorage(origin)) {
     if (isolated_origin_.is_empty())
       isolated_origin_ = origin;
     // Record isolated_origin_, but always disable for now.
     // crbug.com/264429
+    if (isolated_origin_ != origin) {
+      UMA_HISTOGRAM_ENUMERATION("FileSystem.IsolatedOriginStatus",
+                                kIsolatedOriginDontMatch,
+                                kIsolatedOriginStatusMax);
+    } else {
+      UMA_HISTOGRAM_ENUMERATION("FileSystem.IsolatedOriginStatus",
+                                kIsolatedOriginMatch,
+                                kIsolatedOriginStatusMax);
+    }
     return false;
   }
   return false;
 }
 
 }  // namespace fileapi