android_webview: stop leaking Contexts.

android_webview/glue/java/src/com/android/webview/chromium/WebViewChromiumFactoryProvider.java

Index: android_webview/glue/java/src/com/android/webview/chromium/WebViewChromiumFactoryProvider.java
diff --git a/android_webview/glue/java/src/com/android/webview/chromium/WebViewChromiumFactoryProvider.java b/android_webview/glue/java/src/com/android/webview/chromium/WebViewChromiumFactoryProvider.java
index 5d3d668bafb603f1c478b33d0390533ef080514f..041ffe2edb444be46a1858d9ea134345f2d75952 100644
--- a/android_webview/glue/java/src/com/android/webview/chromium/WebViewChromiumFactoryProvider.java
+++ b/android_webview/glue/java/src/com/android/webview/chromium/WebViewChromiumFactoryProvider.java
@@ -79,6 +79,7 @@ public class WebViewChromiumFactoryProvider implements WebViewFactoryProvider {
     private WebStorageAdapter mWebStorage;
     private WebViewDatabaseAdapter mWebViewDatabase;
     private AwDevToolsServer mDevToolsServer;
+    private Context mWrappedAppContext;
 
     private ArrayList<WeakReference<WebViewChromium>> mWebViewsToStart =
             new ArrayList<WeakReference<WebViewChromium>>();
@@ -291,7 +292,11 @@ public class WebViewChromiumFactoryProvider implements WebViewFactoryProvider {
     }
 
     private Context getWrappedCurrentApplicationContext() {
-        return ResourcesContextWrapperFactory.get(mWebViewDelegate.getApplication());
+        if (mWrappedAppContext == null) {
+            mWrappedAppContext = ResourcesContextWrapperFactory.get(
+                    mWebViewDelegate.getApplication());
+        }
+        return mWrappedAppContext;
     }
 
     AwBrowserContext getBrowserContext() {