Merge pull request #135 from immutable/feat/clear-gree-cache-storage

feat: ability to clear android and ios gree cache and storage

Author: nattb8

Plugins/Android/Gree-Android/webview-nofragment/src/main/java/net/gree/unitywebview/CWebViewPluginNoUi.java

@@ -42,6 +42,7 @@
 import android.webkit.WebResourceRequest;
 import android.webkit.WebResourceResponse;
 import android.webkit.WebSettings;
+import android.webkit.WebStorage;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 
@@ -288,4 +289,32 @@ public void run() {
             }
         });
     }
+
+    public void ClearCache(final boolean includeDiskFiles)
+    {
+        final Activity a = UnityPlayer.currentActivity;
+        if (CWebViewPluginNoUi.isDestroyed(a)) {
+            return;
+        }
+        a.runOnUiThread(new Runnable() {public void run() {
+            if (mWebView == null) {
+                return;
+            }
+            mWebView.clearCache(includeDiskFiles);
+        }});
+    }
+
+    public void ClearStorage()
+    {
+        final Activity a = UnityPlayer.currentActivity;
+        if (CWebViewPluginNoUi.isDestroyed(a)) {
+            return;
+        }
+        a.runOnUiThread(new Runnable() {public void run() {
+            if (mWebView == null) {
+                return;
+            }
+            WebStorage.getInstance().deleteAllData();
+        }});
+    }
 }