Remove potential unsatisfied linker error.

chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModelImpl.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModelImpl.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModelImpl.java b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModelImpl.java
index d42071f65e7e60ed3a9baeea62d66642f97de38f..bae9db2299e9416626a42fa0fd809acc157e61ef 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModelImpl.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModelImpl.java
@@ -10,7 +10,6 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.os.StrictMode;
-import android.os.SystemClock;
 import android.text.TextUtils;
 import android.util.Log;
 import android.util.Pair;
@@ -22,7 +21,6 @@ import org.chromium.base.ApplicationStatus;
 import org.chromium.base.ObserverList;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.VisibleForTesting;
-import org.chromium.base.metrics.RecordHistogram;
 import org.chromium.chrome.browser.TabState;
 import org.chromium.chrome.browser.document.DocumentActivity;
 import org.chromium.chrome.browser.document.DocumentMetricIds;
@@ -45,7 +43,6 @@ import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
-import java.util.concurrent.TimeUnit;
 
 /**
  * Maintains a list of Tabs displayed when Chrome is running in document-mode.
@@ -513,11 +510,8 @@ public class DocumentTabModelImpl extends TabModelJniBridge implements DocumentT
                 // Temporarily allowing disk access while fixing. TODO: http://crbug.com/543201
                 StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
                 try {
-                    long time = SystemClock.elapsedRealtime();
                     entry.setTabState(
                             mStorageDelegate.restoreTabState(mPrioritizedTabId, isIncognito()));
-                    RecordHistogram.recordTimesHistogram("Android.StrictMode.DocumentTabStateLoad",
-                            SystemClock.elapsedRealtime() - time, TimeUnit.MILLISECONDS);
                 } finally {
                     StrictMode.setThreadPolicy(oldPolicy);
                 }