Add UMA metrics for the time it takes to read store from disk and apply update

components/safe_browsing_db/v4_store_unittest.cc

 // Copyright 2016 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 "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "base/test/test_simple_task_runner.h"
@@ skipping 690 matching lines @@
 }
 
 #if defined(NDEBUG) && !defined(DCHECK_ALWAYS_ON)
 // This test hits a NOTREACHED so it is a release mode only test.
 TEST_F(V4StoreTest, TestAdditionsWithRiceEncodingFailsWithInvalidInput) {
   RepeatedPtrField<ThreatEntrySet> additions;
   ThreatEntrySet* addition = additions.Add();
   addition->set_compression_type(RICE);
   addition->mutable_rice_hashes()->set_num_entries(-1);
   HashPrefixMap additions_map;
-  EXPECT_EQ(RICE_DECODING_FAILURE, V4Store::UpdateHashPrefixMapFromAdditions(
-                                       additions, &additions_map));
+  EXPECT_EQ(RICE_DECODING_FAILURE,
+            V4Store(task_runner_, store_path_)
+                .UpdateHashPrefixMapFromAdditions(additions, &additions_map));
 }
 #endif
 
 TEST_F(V4StoreTest, TestAdditionsWithRiceEncodingSucceeds) {
   RepeatedPtrField<ThreatEntrySet> additions;
   ThreatEntrySet* addition = additions.Add();
   addition->set_compression_type(RICE);
   RiceDeltaEncoding* rice_hashes = addition->mutable_rice_hashes();
   rice_hashes->set_first_value(5);
   rice_hashes->set_num_entries(3);
   rice_hashes->set_rice_parameter(28);
   // The following value is hand-crafted by getting inspiration from:
   // https://goto.google.com/testlargenumbersriceencoded
   // The value listed at that place fails the "integer overflow" check so I
   // modified it until the decoder parsed it successfully.
   rice_hashes->set_encoded_data(
       "\xbf\xa8\x3f\xfb\xf\xf\x5e\x27\xe6\xc3\x1d\xc6\x38");
   HashPrefixMap additions_map;
-  EXPECT_EQ(APPLY_UPDATE_SUCCESS, V4Store::UpdateHashPrefixMapFromAdditions(
-                                      additions, &additions_map));
+  EXPECT_EQ(APPLY_UPDATE_SUCCESS,
+            V4Store(task_runner_, store_path_)
+                .UpdateHashPrefixMapFromAdditions(additions, &additions_map));
   EXPECT_EQ(1u, additions_map.size());
   EXPECT_EQ(std::string("\x5\0\0\0\fL\x93\xADV\x7F\xF6o\xCEo1\x81", 16),
             additions_map[4]);
 }
 
 TEST_F(V4StoreTest, TestRemovalsWithRiceEncodingSucceeds) {
   HashPrefixMap prefix_map_old;
   EXPECT_EQ(APPLY_UPDATE_SUCCESS,
             V4Store::AddUnlumpedHashes(4, "1111abcdefgh", &prefix_map_old));
   HashPrefixMap prefix_map_additions;
@@ skipping 49 matching lines @@
 
   HashPrefixMap prefix_map_old;
   EXPECT_EQ(APPLY_UPDATE_SUCCESS,
             V4Store::AddUnlumpedHashes(4, "2222", &prefix_map_old));
   EXPECT_EQ(CHECKSUM_MISMATCH_FAILURE,
             V4Store(task_runner_, store_path_)
                 .MergeUpdate(prefix_map_old, HashPrefixMap(), nullptr, "aawc"));
 }
 
 }  // namespace safe_browsing