Simple Cache: Add two optional stream 2 histograms

net/disk_cache/simple/simple_index_unittest.cc

 // Copyright (c) 2013 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 <algorithm>
 #include <functional>
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/hash.h"
 #include "base/logging.h"
@@ skipping 520 matching lines @@
   index()->Insert(hashes_.at<3>());
   // Confirm index is as expected: No eviction, everything there.
   EXPECT_EQ(3, index()->GetEntryCount());
   EXPECT_EQ(0, doom_entries_calls());
   EXPECT_TRUE(index()->Has(hashes_.at<1>()));
   EXPECT_TRUE(index()->Has(hashes_.at<2>()));
   EXPECT_TRUE(index()->Has(hashes_.at<3>()));
 
   // Trigger an eviction, and make sure the right things are tossed.
   // TODO(rdsmith): This is dependent on the innards of the implementation
-  // as to at exactly what point we trigger eviction.  Not sure how to fix
+  // as to at exactly what point we trigger eviction. Not sure how to fix
   // that.
   index()->UpdateEntrySize(hashes_.at<3>(), 475);
   EXPECT_EQ(1, doom_entries_calls());
   EXPECT_EQ(1, index()->GetEntryCount());
   EXPECT_FALSE(index()->Has(hashes_.at<1>()));
   EXPECT_FALSE(index()->Has(hashes_.at<2>()));
   EXPECT_TRUE(index()->Has(hashes_.at<3>()));
   ASSERT_EQ(2u, last_doom_entry_hashes().size());
 }
 
@@ skipping 68 matching lines @@
   WaitForTimeChange();
   EXPECT_EQ(expected_trigger, index()->write_to_disk_timer_.desired_run_time());
   index()->Insert(hashes_.at<2>());
   index()->UpdateEntrySize(hashes_.at<2>(), 40);
   EXPECT_TRUE(index()->write_to_disk_timer_.IsRunning());
   EXPECT_LT(expected_trigger, index()->write_to_disk_timer_.desired_run_time());
   index()->write_to_disk_timer_.Stop();
 }
 
 }  // namespace disk_cache