[Android] Implement WebSettings.setAppCache{Enabled|Path}

content/public/android/java/src/org/chromium/content/browser/ContentSettings.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentSettings.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentSettings.java b/content/public/android/java/src/org/chromium/content/browser/ContentSettings.java
index 3ccf1f1a48eb6872c6b372967cf0870402ba49d7..47e4a6b8e68bd36818c9d36812e19e9c52252405 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentSettings.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentSettings.java
@@ -78,6 +78,8 @@ public class ContentSettings {
     private boolean mJavaScriptCanOpenWindowsAutomatically = false;
     private boolean mSupportMultipleWindows = false;
     private PluginState mPluginState = PluginState.OFF;
+    private boolean mAppCacheEnabled = false;
+    private String mAppCachePath = null;
     private boolean mDomStorageEnabled = false;
 
     // Not accessed by the native side.
@@ -919,6 +921,45 @@ public class ContentSettings {
     }
 
     /**
+     * Sets whether the Application Caches API should be enabled. The default
+     * is false. Note that in order for the Application Caches API to be
+     * enabled, a valid database path must also be supplied to
+     * {@link #setAppCachePath}.
+     *
+     * @param flag true if the WebView should enable Application Caches
+     */
+    public void setAppCacheEnabled(boolean flag) {
+        assert mCanModifySettings;
+        synchronized (mContentSettingsLock) {
+            if (mAppCacheEnabled != flag) {
+                mAppCacheEnabled = flag;
+                mEventHandler.syncSettingsLocked();
+            }
+        }
+    }
+
+    /**
+     * Sets the path to the Application Caches files. In order for the
+     * Application Caches API to be enabled, this method must be called with a
+     * path to which the application can write. This method should only be
+     * called once: repeated calls are ignored.
+     *
+     * @param appCachePath a String path to the directory containing
+     *                     Application Caches files.
+     * @see setAppCacheEnabled
+     */
+    public void setAppCachePath(String path) {
+        assert mCanModifySettings;
+        synchronized (mContentSettingsLock) {
+            // AppCachePath can only be set once.
+            if (mAppCachePath == null && path != null && !path.isEmpty()) {
+                mAppCachePath = path;
+                mEventHandler.syncSettingsLocked();
+            }
+        }
+    }
+
+    /**
      * Sets whether the DOM storage API is enabled. The default value is false.
      *
      * @param flag true if the ContentView should use the DOM storage API