Turn on strict mode for all userdebug builds.

chrome/android/java/src/org/chromium/chrome/browser/init/ChromeBrowserInitializer.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.init;
 
 import android.content.Context;
 import android.os.Build;
 import android.os.Handler;
 import android.os.Looper;
@@ skipping 236 matching lines @@
 
     private void onFinishNativeInitialization() {
         if (mNativeInitializationComplete) return;
 
         mNativeInitializationComplete = true;
         ContentUriUtils.setFileProviderUtil(new FileProviderHelper());
     }
 
     private static void configureStrictMode() {
         CommandLine commandLine = CommandLine.getInstance();
-        if ("eng".equals(Build.TYPE) || commandLine.hasSwitch(ChromeSwitches.STRICT_MODE)) {
+        if ("eng".equals(Build.TYPE)
+                || "userdebug".equals(Build.TYPE)

[jdduke (slow), 2015/06/01 21:34:58]

Ned, Annie: Can we somehow bypass this for telemetry perf tests? Perhaps when
the "--enable-gpu-benchmarking" flag is present? Or should we add a more
official flag for telemetry runs?

[nednguyen, 2015/06/01 21:37:53]

I would push back adding further flags to telemetry. What does this strict mode
do and why do we want to bypass this for telemetry per tests?

+                || commandLine.hasSwitch(ChromeSwitches.STRICT_MODE)) {
             StrictMode.enableDefaults();
             StrictMode.ThreadPolicy.Builder policy =
                     new StrictMode.ThreadPolicy.Builder(StrictMode.getThreadPolicy());
             policy = policy.detectAll()
                     .penaltyFlashScreen()
                     .penaltyDeathOnNetwork();
             if ("death".equals(commandLine.getSwitchValue(ChromeSwitches.STRICT_MODE))) {
                 policy = policy.penaltyDeath();
                 StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder(StrictMode.getVmPolicy())
                         .penaltyDeath()
                         .build());
             }
             StrictMode.setThreadPolicy(policy.build());
         }
     }
 
     private void waitForDebuggerIfNeeded() {
         if (CommandLine.getInstance().hasSwitch(BaseSwitches.WAIT_FOR_JAVA_DEBUGGER)) {
             Log.e(TAG, "Waiting for Java debugger to connect...");
             android.os.Debug.waitForDebugger();
             Log.e(TAG, "Java debugger connected. Resuming execution.");
         }
     }
 }