Android: cleanup jni_android to minimize external dependencies.

Other projects will be using the JNI bindings.
- Move GetMethodIDFromClassName down to content/browser/renderer_host/java,
the only place where it's used.
- Remove a few methods that are no longer in use.
- Trim down dependencies.

BUG=

Review URL: https://codereview.chromium.org/23835020

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225471 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 27 insertions, 0 deletions

diff --git a/content/browser/renderer_host/java/jni_helper.h b/content/browser/renderer_host/java/jni_helper.h
new file mode 100644
index 0000000..aaba53b
--- /dev/null
+++ b/content/browser/renderer_host/java/jni_helper.h
@@ -0,0 +1,27 @@
+// Copyright 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 CONTENT_BROWSER_RENDERER_HOST_JAVA_JNI_HELPER_H_
+#define CONTENT_BROWSER_RENDERER_HOST_JAVA_JNI_HELPER_H_
+
+#include <jni.h>
+
+#include "content/common/content_export.h"
+
+namespace content {
+
+// Gets the method ID from the class name. Clears the pending Java exception
+// and returns NULL if the method is not found. Caches results.
+// Strings passed to this function are held in the cache and MUST remain valid
+// beyond the duration of all future calls to this function, across all
+// threads. In practice, this means that the function should only be used with
+// string constants.
+CONTENT_EXPORT jmethodID GetMethodIDFromClassName(JNIEnv* env,
+                                                  const char* class_name,
+                                                  const char* method,
+                                                  const char* jni_signature);
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_JAVA_JNI_HELPER_H_