[Android] Introduce a Java wrapper for TemplateUrlService.

base/android/jni_map.h

+// Copyright (c) 2013 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.
+
+#ifndef BASE_ANDROID_JNI_MAP_H_
+#define BASE_ANDROID_JNI_MAP_H_
+
+#include <jni.h>
+#include <map>
+#include <string>
+
+#include "base/android/scoped_java_ref.h"
+#include "base/base_export.h"
+#include "base/string16.h"
+
+namespace base {
+namespace android {
+
+// Convert a std::map<std::string, string16> to a Java HashMap.

[nyquist, 2013/02/20 07:33:09]

Mention the generics type of the Java HashMap (<String, String>)

[Yaron, 2013/02/21 21:39:15]

Done.

+BASE_EXPORT ScopedJavaLocalRef<jobject> ConvertMapToJavaMap(
+    JNIEnv* env,
+    const std::map<std::string, string16>& cmap);
+
+// Convert a Java subclass of map to std::map. Assumes values are string16
+BASE_EXPORT std::map<std::string, string16> ConvertJavaMapToMap(JNIEnv* env,

[nyquist, 2013/02/20 07:33:09]

Since you throw out both null keys and even null values, maybe mention that in
this documentation?

[Yaron, 2013/02/21 21:39:15]

Done.

+                                                                jobject jmap);
+
+}  // namespace android
+}  // namespace base
+
+#endif  // BASE_ANDROID_JNI_MAP_H_
+

[bulach, 2013/02/20 14:41:25]

nit: extra \n

[Yaron, 2013/02/21 21:39:15]

Done.