Fix overflow when logging MaxInt32 to a sparse histogram.

components/translate/core/common/translate_metrics_unittest.cc

Index: components/translate/core/common/translate_metrics_unittest.cc
diff --git a/components/translate/core/common/translate_metrics_unittest.cc b/components/translate/core/common/translate_metrics_unittest.cc
index 620a5598067bf72683d0fd183f41142c1ce37261..011903026a2cc8b10b1180dac9029d2c98264577 100644
--- a/components/translate/core/common/translate_metrics_unittest.cc
+++ b/components/translate/core/common/translate_metrics_unittest.cc
@@ -109,7 +109,7 @@ class MetricsRecorder {
     for (std::unique_ptr<SampleCountIterator> i = samples_->Iterator();
          !i->Done(); i->Next()) {
       HistogramBase::Sample min;
-      HistogramBase::Sample max;
+      int64_t max;
       HistogramBase::Count count;
       i->Get(&min, &max, &count);
       if (min <= value && value <= max && count >= 1)