Reland of Add GN build rules to allow java_assertion_enabler to enable Java asserts.

android_webview/glue/java/src/com/android/webview/chromium/WebViewChromiumFactoryProvider.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 com.android.webview.chromium;
 
 import android.Manifest;
 import android.app.ActivityManager;
 import android.content.ComponentCallbacks2;
 import android.content.Context;
@@ skipping 425 matching lines @@
     }
 
     void startYourEngines(boolean onMainThread) {
         synchronized (mLock) {
             ensureChromiumStartedLocked(onMainThread);
         }
     }
 
     // Only on UI thread.
     AwBrowserContext getBrowserContextOnUiThread() {
-        assert mStarted;
+        // TODO(crbug.com/667337)
+        // assert mStarted;
+
         if (BuildConfig.DCHECK_IS_ON && !ThreadUtils.runningOnUiThread()) {
             throw new RuntimeException(
                     "getBrowserContextOnUiThread called on " + Thread.currentThread());
         }
 
         if (mBrowserContext == null) {
             mBrowserContext =
                     new AwBrowserContext(mWebViewPrefs, ContextUtils.getApplicationContext());
         }
         return mBrowserContext;
@@ skipping 192 matching lines @@
                         this, HttpAuthDatabase.newInstance(context, HTTP_AUTH_DATABASE_FILE));
             }
         }
         return mWebViewDatabase;
     }
 
     WebViewDelegate getWebViewDelegate() {
         return mWebViewDelegate;
     }
 }