Update to Chromium //base at Chromium commit 3e81715e6d3a4324362635aea46ce1f1a163cca1.

android/java/src/org/chromium/base/metrics/RecordHistogram.java

Index: android/java/src/org/chromium/base/metrics/RecordHistogram.java
diff --git a/android/java/src/org/chromium/base/metrics/RecordHistogram.java b/android/java/src/org/chromium/base/metrics/RecordHistogram.java
index d94b9800abb0f50fb5e7363f8cb7c9eb87b21ce0..a47360e849108e9ec0fde16676be21f5d640948f 100644
--- a/android/java/src/org/chromium/base/metrics/RecordHistogram.java
+++ b/android/java/src/org/chromium/base/metrics/RecordHistogram.java
@@ -78,6 +78,21 @@ public class RecordHistogram {
     }
 
     /**
+     * Records a sample in a linear histogram. This is the Java equivalent for using
+     * base::LinearHistogram.
+     * @param name name of the histogram
+     * @param sample sample to be recorded, at least |min| and at most |max| - 1.
+     * @param min lower bound for expected sample values, should be at least 1.
+     * @param max upper bounds for expected sample values
+     * @param numBuckets the number of buckets
+     */
+    public static void recordLinearCountHistogram(
+            String name, int sample, int min, int max, int numBuckets) {
+        nativeRecordLinearCountHistogram(
+                name, System.identityHashCode(name), sample, min, max, numBuckets);
+    }
+
+    /**
     * Records a sparse histogram. This is the Java equivalent of UMA_HISTOGRAM_SPARSE_SLOWLY.
     * @param name name of the histogram
     * @param sample sample to be recorded. All values of |sample| are valid, including negative
@@ -170,6 +185,8 @@ public class RecordHistogram {
             String name, int key, int sample, int boundary);
     private static native void nativeRecordCustomCountHistogram(
             String name, int key, int sample, int min, int max, int numBuckets);
+    private static native void nativeRecordLinearCountHistogram(
+            String name, int key, int sample, int min, int max, int numBuckets);
     private static native void nativeRecordSparseHistogram(String name, int key, int sample);
 
     private static native int nativeGetHistogramValueCountForTesting(String name, int sample);