Enabling sampling of UMA and crash reports on Android.

chrome/android/java/src/org/chromium/chrome/browser/metrics/UmaUtils.java

Index: chrome/android/java/src/org/chromium/chrome/browser/metrics/UmaUtils.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/metrics/UmaUtils.java b/chrome/android/java/src/org/chromium/chrome/browser/metrics/UmaUtils.java
index 6dad167052a8710a0976162c10d4193cd44ae864..fbb579c42d4a2ca132497971111804a6c1c4fb06 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/metrics/UmaUtils.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/metrics/UmaUtils.java
@@ -55,6 +55,14 @@ public class UmaUtils {
     }
 
     /**
+     * Determines if this client is eligible to send metrics. If they are, and there was user
+     * consent, then metrics and crashes would be reported.
+     */
+    public static boolean isClientInSample() {
+        return nativeIsClientInMetricsReportingSample();

[Alexei Svitkine (slow), 2016/08/18 06:16:39]

Please make the native* name consistent with the method name.

i.e. either make it nativeIsClientInSample or make the other mthod
isClientInMetricsReportingSample.

[jwd, 2016/08/23 18:40:03]

Done.

+    }
+
+    /**
      * Sets whether metrics reporting was opt-in or not. If it was opt-in, then the enable checkbox
      * on first-run was default unchecked. If it was opt-out, then the checkbox was default checked.
      * This should only be set once, and only during first-run.
@@ -73,5 +81,6 @@ public class UmaUtils {
         return sForegroundStartTimeMs;
     }
 
+    private static native boolean nativeIsClientInMetricsReportingSample();
     private static native void nativeRecordMetricsReportingDefaultOptIn(boolean optIn);
 }