Connect SparseHistogram with the rest of stats system

net/url_request/url_request_throttler_unittest.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 "net/url_request/url_request_throttler_manager.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/histogram_samples.h"
 #include "base/metrics/statistics_recorder.h"
@@ skipping 11 matching lines @@
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::TimeDelta;
 using base::TimeTicks;
 
 namespace net {
 
 namespace {
 
 using base::Histogram;
+using base::HistogramBase;
 using base::HistogramSamples;
 using base::StatisticsRecorder;
 
 class MockURLRequestThrottlerEntry : public URLRequestThrottlerEntry {
  public:
   explicit MockURLRequestThrottlerEntry(
       net::URLRequestThrottlerManager* manager)
       : net::URLRequestThrottlerEntry(manager, ""),
         mock_backoff_entry_(&backoff_policy_) {
     InitPolicy();
@@ skipping 162 matching lines @@
   request_.set_load_flags(0);
 
   now_ = TimeTicks::Now();
   entry_ = new MockURLRequestThrottlerEntry(&manager_);
   entry_->ResetToBlank(now_);
 
   for (size_t i = 0; i < arraysize(kHistogramNames); ++i) {
     // Must retrieve original samples for each histogram for comparison
     // as other tests may affect them.
     const char* name = kHistogramNames[i];
-    Histogram* histogram = StatisticsRecorder::FindHistogram(name);
+    HistogramBase* histogram = StatisticsRecorder::FindHistogram(name);
     if (histogram) {
       original_samples_[name] = histogram->SnapshotSamples().release();
     } else {
       original_samples_[name] = NULL;
     }
   }
 }
 
 void URLRequestThrottlerEntryTest::TearDown() {
   STLDeleteValues(&original_samples_);
   STLDeleteValues(&samples_);
 }
 
 void URLRequestThrottlerEntryTest::CalculateHistogramDeltas() {
   for (size_t i = 0; i < arraysize(kHistogramNames); ++i) {
     const char* name = kHistogramNames[i];
     HistogramSamples* original = original_samples_[name];
 
-    Histogram* histogram = StatisticsRecorder::FindHistogram(name);
+    HistogramBase* histogram = StatisticsRecorder::FindHistogram(name);
     if (histogram) {
-      ASSERT_EQ(Histogram::kUmaTargetedHistogramFlag, histogram->flags());
+      ASSERT_EQ(HistogramBase::kUmaTargetedHistogramFlag, histogram->flags());
 
       scoped_ptr<HistogramSamples> samples(histogram->SnapshotSamples());
       if (original)
         samples->Subtract(*original);
       samples_[name] = samples.release();
     }
   }
 
   // Ensure we don't accidentally use the originals in our tests.
   STLDeleteValues(&original_samples_);
@@ skipping 308 matching lines @@
         FAIL();
     }
 
     scoped_refptr<net::URLRequestThrottlerEntryInterface> entry_after =
         manager.RegisterRequestUrl(GURL("http://www.example.com/"));
     EXPECT_FALSE(entry_after->ShouldRejectRequest(request_));
   }
 }
 
 }  // namespace net