Metrics for user interests shown on the NTP.

chrome/android/java/src/org/chromium/chrome/browser/ntp/InterestsItemView.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/InterestsItemView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/InterestsItemView.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/InterestsItemView.java
index 7acb3b7ad081e8319e60cdd87f027cba46f4d7d9..f7e7c2e689183713f40b3a9a4998a00a7c35c5ac 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/InterestsItemView.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/InterestsItemView.java
@@ -26,6 +26,7 @@ import android.view.View;
 import android.view.View.OnClickListener;
 
 import org.chromium.base.Log;
+import org.chromium.base.metrics.RecordHistogram;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ntp.InterestsPage.InterestsClickListener;
 import org.chromium.chrome.browser.ntp.InterestsService.Interest;
@@ -232,9 +233,10 @@ class InterestsItemView extends AppCompatTextView implements OnClickListener {
      */
     private class ImageDownloadedCallback {
         public void onCallback(Drawable image, String url) {
-            if (image == null) {
-                return;
-            }
+            boolean imageDownloadSuccess = image != null;
+            RecordHistogram.recordBooleanHistogram(
+                    "NewTabPage.Interests.ImageDownloadSuccess", imageDownloadSuccess);
+            if (!imageDownloadSuccess) return;
             // If the Interest this View is displaying has changed while downloading, do not update
             // the image.
             if (url == mInterest.getImageUrl()) {