Adding java implementation for Geolocation

android_webview/java/src/org/chromium/android_webview/AwGeolocationPermissions.java

Index: android_webview/java/src/org/chromium/android_webview/AwGeolocationPermissions.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwGeolocationPermissions.java b/android_webview/java/src/org/chromium/android_webview/AwGeolocationPermissions.java
new file mode 100644
index 0000000000000000000000000000000000000000..7b4b945e79309025c5381dc7ddcb6b8b8a5a86b1
--- /dev/null
+++ b/android_webview/java/src/org/chromium/android_webview/AwGeolocationPermissions.java
@@ -0,0 +1,101 @@
+// Copyright (c) 2012 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 org.chromium.android_webview;
+
+import android.content.SharedPreferences;
+import android.webkit.ValueCallback;
+
+import org.chromium.base.JNINamespace;
+import org.chromium.base.ThreadUtils;
+import org.chromium.net.GURLUtils;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * This class is used to manage permissions for the WebView's Geolocation JavaScript API.
+ *
+ * Callbacks are posted on the UI thread.
+ */
+public final class AwGeolocationPermissions {
+
+    private static final String PREF_PREFIX =
+            AwGeolocationPermissions.class.getCanonicalName() + "%";
+    private final SharedPreferences mSharedPreferences;
+
+    public AwGeolocationPermissions(SharedPreferences sharedPreferences) {
+        mSharedPreferences = sharedPreferences;
+    }
+
+    public void allow(String origin) {
+        String key = getOriginKey(origin);
+        if (key != null) {
+            mSharedPreferences.edit().putBoolean(key, true).apply();
+        }
+    }
+
+    public void deny(String origin) {
+        String key = getOriginKey(origin);
+        if (key != null) {
+            mSharedPreferences.edit().putBoolean(key, false).apply();
+        }
+    }
+
+    public void clear(String origin) {
+        String key = getOriginKey(origin);
+        if (key != null) {
+            mSharedPreferences.edit().remove(key).apply();
+        }
+    }
+
+    public void clearAll() {
+        for (String name : mSharedPreferences.getAll().keySet()) {
+            if (name.startsWith(PREF_PREFIX)) {
+                mSharedPreferences.edit().remove(name).apply();
+            }
+        }
+    }
+
+    public void getAllowed(String origin, final ValueCallback<Boolean> callback) {
+        boolean allowed = false;
+        try {
+            String key = getOriginKey(origin);
+            if (key != null) {
+                allowed = mSharedPreferences.getBoolean(key, false);
+            }
+        } catch (ClassCastException e) {
+            // Want to return false in this case, do nothing here
+        }
+        final boolean finalAllowed = allowed;
+        ThreadUtils.postOnUiThread(new Runnable() {
+            public void run() {
+                callback.onReceiveValue(finalAllowed);
+            }
+        });
+    }
+
+    public void getOrigins(final ValueCallback<Set<String>> callback) {
+        final Set<String> origins = new HashSet<String>();
+        for (String name : mSharedPreferences.getAll().keySet()) {
+            if (name.startsWith(PREF_PREFIX)) {
+                origins.add(name.substring(PREF_PREFIX.length()));
+            }
+        }
+        ThreadUtils.postOnUiThread(new Runnable() {
+            public void run() {
+                callback.onReceiveValue(origins);
+            }
+        });
+    }
+
+    private String getOriginKey(String url) {
+        String origin = GURLUtils.getOrigin(url);
+        if (origin.isEmpty()) {
+            return null;
+        }
+
+        return PREF_PREFIX + origin;
+    }
+}