[Metrics] Move CachingPermutedEntropyProvider into the variations component.

chrome/browser/metrics/metrics_state_manager_unittest.cc

 // Copyright 2014 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 "chrome/browser/metrics/metrics_state_manager.h"
 
 #include <ctype.h>
 #include <string>
 
 #include "base/command_line.h"
 #include "base/prefs/testing_pref_service.h"
 #include "chrome/common/chrome_switches.h"
-#include "chrome/common/metrics/caching_permuted_entropy_provider.h"
 #include "chrome/common/pref_names.h"
+#include "components/variations/caching_permuted_entropy_provider.h"
+#include "components/variations/pref_names.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace metrics {
 
 class MetricsStateManagerTest : public testing::Test {
  public:
   MetricsStateManagerTest() {
     MetricsStateManager::RegisterPrefs(prefs_.registry());
   }
 
@@ skipping 51 matching lines @@
   // Now, set it to 0 and ensure it doesn't get reset.
   state_manager->low_entropy_source_ = 0;
   EXPECT_EQ(0, state_manager->GetLowEntropySource());
   // Call it another time, just to make sure.
   EXPECT_EQ(0, state_manager->GetLowEntropySource());
 }
 
 TEST_F(MetricsStateManagerTest,
        PermutedEntropyCacheClearedWhenLowEntropyReset) {
   const PrefService::Preference* low_entropy_pref =
-      prefs_.FindPreference(prefs::kMetricsLowEntropySource);
-  const char* kCachePrefName = prefs::kMetricsPermutedEntropyCache;
+      prefs_.FindPreference(::prefs::kMetricsLowEntropySource);
+  const char* kCachePrefName = prefs::kVariationsPermutedEntropyCache;
   int low_entropy_value = -1;
 
   // First, generate an initial low entropy source value.
   {
     EXPECT_TRUE(low_entropy_pref->IsDefaultValue());
 
     scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
     state_manager->GetLowEntropySource();
 
     EXPECT_FALSE(low_entropy_pref->IsDefaultValue());
     EXPECT_TRUE(low_entropy_pref->GetValue()->GetAsInteger(&low_entropy_value));
   }
 
   // Now, set a dummy value in the permuted entropy cache pref and verify that
   // another call to GetLowEntropySource() doesn't clobber it when
   // --reset-variation-state wasn't specified.
   {
     prefs_.SetString(kCachePrefName, "test");
 
     scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
     state_manager->GetLowEntropySource();
 
     EXPECT_EQ("test", prefs_.GetString(kCachePrefName));
     EXPECT_EQ(low_entropy_value,
-              prefs_.GetInteger(prefs::kMetricsLowEntropySource));
+              prefs_.GetInteger(::prefs::kMetricsLowEntropySource));
   }
 
   // Verify that the cache does get reset if --reset-variations-state is passed.
   {
     CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kResetVariationState);
 
     scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
     state_manager->GetLowEntropySource();
 
     EXPECT_TRUE(prefs_.GetString(kCachePrefName).empty());
   }
 }
 
 // Check that setting the kMetricsResetIds pref to true causes the client id to
 // be reset. We do not check that the low entropy source is reset because we
 // cannot ensure that metrics state manager won't generate the same id again.
 TEST_F(MetricsStateManagerTest, ResetMetricsIDs) {
   // Set an initial client id in prefs. It should not be possible for the
   // metrics state manager to generate this id randomly.
   const std::string kInitialClientId = "initial client id";
-  prefs_.SetString(prefs::kMetricsClientID, kInitialClientId);
+  prefs_.SetString(::prefs::kMetricsClientID, kInitialClientId);
 
   // Make sure the initial client id isn't reset by the metrics state manager.
   {
     scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
     state_manager->ForceClientIdCreation();
     EXPECT_EQ(kInitialClientId, state_manager->client_id());
   }
 
   // Set the reset pref to cause the IDs to be reset.
-  prefs_.SetBoolean(prefs::kMetricsResetIds, true);
+  prefs_.SetBoolean(::prefs::kMetricsResetIds, true);
 
   // Cause the actual reset to happen.
   {
     scoped_ptr<MetricsStateManager> state_manager(CreateStateManager());
     state_manager->ForceClientIdCreation();
     EXPECT_NE(kInitialClientId, state_manager->client_id());
 
     state_manager->GetLowEntropySource();
 
-    EXPECT_FALSE(prefs_.GetBoolean(prefs::kMetricsResetIds));
+    EXPECT_FALSE(prefs_.GetBoolean(::prefs::kMetricsResetIds));
   }
 
-  EXPECT_NE(kInitialClientId, prefs_.GetString(prefs::kMetricsClientID));
+  EXPECT_NE(kInitialClientId, prefs_.GetString(::prefs::kMetricsClientID));
 }
 
 }  // namespace metrics