Fix overflow in user traffic content type histogram

components/data_use_measurement/core/data_use_measurement.h

Index: components/data_use_measurement/core/data_use_measurement.h
diff --git a/components/data_use_measurement/core/data_use_measurement.h b/components/data_use_measurement/core/data_use_measurement.h
index 931d6f1033d3a1fc50652411e3e6dd8e864d807f..d0e37c1ffb751c12ce7ee84ff78ba777042fa61d 100644
--- a/components/data_use_measurement/core/data_use_measurement.h
+++ b/components/data_use_measurement/core/data_use_measurement.h
@@ -194,6 +194,10 @@ class DataUseMeasurement {
   bool no_reads_since_background_;
 #endif
 
+  // User traffic data use by content type is logged in 1KB increments. The
+  // remaining bytes are saved in this array until logged next time.
+  int16_t user_traffic_content_type_bytes_[DataUseUserData::TYPE_MAX];
+
   DISALLOW_COPY_AND_ASSIGN(DataUseMeasurement);
 };