android_webview: stop leaking Contexts.

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.app.ActivityManager;
 import android.content.ComponentCallbacks2;
 import android.content.Context;
 import android.content.Intent;
@@ skipping 60 matching lines @@
 
     // Initialization guarded by mLock.
     private AwBrowserContext mBrowserContext;
     private Statics mStaticMethods;
     private GeolocationPermissionsAdapter mGeolocationPermissions;
     private CookieManagerAdapter mCookieManager;
     private WebIconDatabaseAdapter mWebIconDatabase;
     private WebStorageAdapter mWebStorage;
     private WebViewDatabaseAdapter mWebViewDatabase;
     private AwDevToolsServer mDevToolsServer;
+    private Context mWrappedAppContext;
 
     private ArrayList<WeakReference<WebViewChromium>> mWebViewsToStart =
             new ArrayList<WeakReference<WebViewChromium>>();
 
     // Read/write protected by mLock.
     private boolean mStarted;
     private AwDataReductionProxyManager mProxyManager;
 
     private SharedPreferences mWebViewPrefs;
     private WebViewDelegate mWebViewDelegate;
@@ skipping 192 matching lines @@
         return mStarted;
     }
 
     void startYourEngines(boolean onMainThread) {
         synchronized (mLock) {
             ensureChromiumStartedLocked(onMainThread);
         }
     }
 
     private Context getWrappedCurrentApplicationContext() {
-        return ResourcesContextWrapperFactory.get(mWebViewDelegate.getApplication());
+        if (mWrappedAppContext == null) {
+            mWrappedAppContext = ResourcesContextWrapperFactory.get(
+                    mWebViewDelegate.getApplication());
+        }
+        return mWrappedAppContext;
     }
 
     AwBrowserContext getBrowserContext() {
         synchronized (mLock) {
             return getBrowserContextLocked();
         }
     }
 
     private AwBrowserContext getBrowserContextLocked() {
         assert Thread.holdsLock(mLock);
@@ skipping 166 matching lines @@
                         browserContext.getHttpAuthDatabase(context));
             }
         }
         return mWebViewDatabase;
     }
 
     WebViewDelegate getWebViewDelegate() {
         return mWebViewDelegate;
     }
 }