Add JavaBoundObject

base/android/jni_android.h

Index: base/android/jni_android.h
diff --git a/base/android/jni_android.h b/base/android/jni_android.h
index 66b3134e35d2b271760c2d9a19952c6affb15b97..462173f85d38cf48b62e466ebeb97e1b0a6ea006 100644
--- a/base/android/jni_android.h
+++ b/base/android/jni_android.h
@@ -30,6 +30,20 @@ void InitApplicationContext(jobject context);
 // Returns the application context assigned by InitApplicationContext().
 jobject GetApplicationContext();
 
+// Wraps a method ID.
+class MethodID {
+ public:
+  jmethodID id() { return id_; }
+ protected:
+  // Gets the method ID from the class name. Clears the pending Java exception
+  // and returns NULL if the method is not found. Note that GetMethodID() below
+  // avoids a class lookup, so should be used in preference when possible.
+  MethodID(JNIEnv* env, const char* class_name, const char* method,
+           const char* jni_signature);
+ private:
+  jmethodID id_;
+};
+
 // Get the method ID for a method. Will clear the pending Java
 // exception and return 0 if the method is not found.
 jmethodID GetMethodID(JNIEnv* env,
@@ -44,8 +58,15 @@ jmethodID GetStaticMethodID(JNIEnv* env,
                             const char* const method,
                             const char* const jni_signature);
 
-// Returns true if an exception is pending in the provided JNIEnv*.
-// If an exception is pending, it is printed.
+// Gets the field ID for a class field. Clears the pending Java exception and
+// returns NULL if the field is not found.
+jfieldID GetFieldID(JNIEnv* env,
+                    jclass clazz,
+                    const char* field,
+                    const char* jni_signature);
+
+// Returns true if an exception is pending in the provided JNIEnv*. If an
+// exception is pending, this function prints and then clears it.
 bool CheckException(JNIEnv* env);
 
 }  // namespace android