SRTFetcher memory histograms should not use LinearHistogram.

chrome/browser/safe_browsing/srt_fetcher_win.cc

Index: chrome/browser/safe_browsing/srt_fetcher_win.cc
diff --git a/chrome/browser/safe_browsing/srt_fetcher_win.cc b/chrome/browser/safe_browsing/srt_fetcher_win.cc
index 1136528758e5a1e61cfaf7804b829d9a811e837e..c846c0220fbf60f5457ff6926dc0f973d13e1236 100644
--- a/chrome/browser/safe_browsing/srt_fetcher_win.cc
+++ b/chrome/browser/safe_browsing/srt_fetcher_win.cc
@@ -360,8 +360,8 @@ class UMAHistogramReporter {
 
   void RecordMemoryKBHistogram(const std::string& name, Sample sample) const {
     // See UMA_HISTOGRAM_MEMORY_KB for the parameters to |FactoryGet|.
-    auto histogram = base::LinearHistogram::FactoryGet(
-        FullName(name), 1000, 500000, 50, kUmaHistogramFlag);
+    auto histogram = base::Histogram::FactoryGet(FullName(name), 1000, 500000,
+                                                 50, kUmaHistogramFlag);
     if (histogram)
       histogram->Add(sample);
   }