Move ChromiumMultiDex to BuildConfig.

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

Index: base/android/java/src/org/chromium/base/metrics/RecordHistogram.java
diff --git a/base/android/java/src/org/chromium/base/metrics/RecordHistogram.java b/base/android/java/src/org/chromium/base/metrics/RecordHistogram.java
index c1b04892e87362dfc459bcbacdb75d817f4fb975..1fc245bdb2bc6520070252184a49a92d23c6c31d 100644
--- a/base/android/java/src/org/chromium/base/metrics/RecordHistogram.java
+++ b/base/android/java/src/org/chromium/base/metrics/RecordHistogram.java
@@ -4,8 +4,10 @@
 
 package org.chromium.base.metrics;
 
+import org.chromium.base.Log;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.annotations.RemovableInRelease;
 
 import java.util.concurrent.TimeUnit;
 
@@ -18,6 +20,29 @@ import java.util.concurrent.TimeUnit;
  */
 @JNINamespace("base::android")
 public class RecordHistogram {
+    private static final String TAG = "RecordHistogram";
+
+    private static boolean sNativeInitialized = false;
+
+    @RemovableInRelease
+    private static void raiseExceptionInDebug(String name) {
+        throw new RuntimeException("Calling RecordHistogram for " + name + " before initialized.");
+    }
+
+    /**
+     * Ensures that an exception is thrown in debug builds when histograms are used before being
+     * initialized. In release just log a warning.
+     * @param name Name of the histogram.
+     * @return Whether histograms have been initialized.
+     */
+    private static boolean isNativeInitialized(String name) {
+        if (!sNativeInitialized) {
+            raiseExceptionInDebug(name);
+            Log.w(TAG, "Calling RecordHistogram for " + name + " before initialized.");
+        }
+        return sNativeInitialized;
+    }
+
     /**
      * Records a sample in a boolean UMA histogram of the given name. Boolean histogram has two
      * buckets, corresponding to success (true) and failure (false). This is the Java equivalent of
@@ -26,7 +51,9 @@ public class RecordHistogram {
      * @param sample sample to be recorded, either true or false
      */
     public static void recordBooleanHistogram(String name, boolean sample) {
-        nativeRecordBooleanHistogram(name, System.identityHashCode(name), sample);
+        if (isNativeInitialized(name)) {
+            nativeRecordBooleanHistogram(name, System.identityHashCode(name), sample);
+        }
     }
 
     /**
@@ -39,7 +66,9 @@ public class RecordHistogram {
      *        lower than |boundary|
      */
     public static void recordEnumeratedHistogram(String name, int sample, int boundary) {
-        nativeRecordEnumeratedHistogram(name, System.identityHashCode(name), sample, boundary);
+        if (isNativeInitialized(name)) {
+            nativeRecordEnumeratedHistogram(name, System.identityHashCode(name), sample, boundary);
+        }
     }
 
     /**
@@ -83,8 +112,10 @@ public class RecordHistogram {
      */
     public static void recordCustomCountHistogram(
             String name, int sample, int min, int max, int numBuckets) {
-        nativeRecordCustomCountHistogram(
-                name, System.identityHashCode(name), sample, min, max, numBuckets);
+        if (isNativeInitialized(name)) {
+            nativeRecordCustomCountHistogram(
+                    name, System.identityHashCode(name), sample, min, max, numBuckets);
+        }
     }
 
     /**
@@ -98,8 +129,10 @@ public class RecordHistogram {
      */
     public static void recordLinearCountHistogram(
             String name, int sample, int min, int max, int numBuckets) {
-        nativeRecordLinearCountHistogram(
-                name, System.identityHashCode(name), sample, min, max, numBuckets);
+        if (isNativeInitialized(name)) {
+            nativeRecordLinearCountHistogram(
+                    name, System.identityHashCode(name), sample, min, max, numBuckets);
+        }
     }
 
     /**
@@ -109,7 +142,9 @@ public class RecordHistogram {
      * @param sample sample to be recorded, at least 0 and at most 100.
      */
     public static void recordPercentageHistogram(String name, int sample) {
-        nativeRecordEnumeratedHistogram(name, System.identityHashCode(name), sample, 101);
+        if (isNativeInitialized(name)) {
+            nativeRecordEnumeratedHistogram(name, System.identityHashCode(name), sample, 101);
+        }
     }
 
     /**
@@ -119,7 +154,9 @@ public class RecordHistogram {
     *        values.
     */
     public static void recordSparseSlowlyHistogram(String name, int sample) {
-        nativeRecordSparseHistogram(name, System.identityHashCode(name), sample);
+        if (isNativeInitialized(name)) {
+            nativeRecordSparseHistogram(name, System.identityHashCode(name), sample);
+        }
     }
 
     /**
@@ -176,8 +213,10 @@ public class RecordHistogram {
 
     private static void recordCustomTimesHistogramMilliseconds(
             String name, long duration, long min, long max, int numBuckets) {
-        nativeRecordCustomTimesHistogramMilliseconds(
-                name, System.identityHashCode(name), duration, min, max, numBuckets);
+        if (isNativeInitialized(name)) {
+            nativeRecordCustomTimesHistogramMilliseconds(
+                    name, System.identityHashCode(name), duration, min, max, numBuckets);
+        }
     }
 
     /**
@@ -187,6 +226,7 @@ public class RecordHistogram {
      */
     @VisibleForTesting
     public static int getHistogramValueCountForTesting(String name, int sample) {
+        // Should fail if native is not loaded since this is testing-only.
         return nativeGetHistogramValueCountForTesting(name, sample);
     }
 
@@ -195,6 +235,7 @@ public class RecordHistogram {
      */
     public static void initialize() {
         nativeInitialize();
+        sNativeInitialized = true;
     }
 
     private static native void nativeRecordCustomTimesHistogramMilliseconds(