diskcache_perftest: fully use base::EvictFileFromSystemCache on android,

net/disk_cache/disk_cache_perftest.cc

 // Copyright (c) 2011 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 <limits>
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/file_enumerator.h"
@@ skipping 203 matching lines @@
   cache_.reset();
 
   // Flush all files in the cache out of system memory.
   const base::FilePath::StringType file_pattern = FILE_PATH_LITERAL("*");
   base::FileEnumerator enumerator(cache_path_, true /* recursive */,
                                   base::FileEnumerator::FILES, file_pattern);
   for (base::FilePath file_path = enumerator.Next(); !file_path.empty();
        file_path = enumerator.Next()) {
     ASSERT_TRUE(base::EvictFileFromSystemCache(file_path));
   }
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_ANDROID)
   // And, cache directories, on platforms where the eviction utility supports
-  // this (currently Linux only).
+  // this (currently Linux and Android only).

[jkarlin, 2017/06/01 15:15:27]

Can you point me to the CL that enabled Android support for directory eviction?

   if (simple_cache_mode_) {
     ASSERT_TRUE(
         base::EvictFileFromSystemCache(cache_path_.AppendASCII("index-dir")));
   }
   ASSERT_TRUE(base::EvictFileFromSystemCache(cache_path_));
 #endif
 
   DisableFirstCleanup();
   InitCache();
 }
@@ skipping 104 matching lines @@
     index.SetMaxSize(kEntries);
     index.UpdateEntrySize(0, 1u);
     evict_elapsed_ms += timer.Elapsed().InMillisecondsF();
   }
 
   LOG(ERROR) << "Average time to evict:" << (evict_elapsed_ms / iterations)
              << "ms";
 }
 
 }  // namespace