Android: cleanup jni_android to minimize external dependencies.

base/android/jni_android.h

 // 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.
 
 #ifndef BASE_ANDROID_JNI_ANDROID_H_
 #define BASE_ANDROID_JNI_ANDROID_H_
 
 #include <jni.h>
 #include <sys/types.h>
 
@@ skipping 38 matching lines @@
 const BASE_EXPORT jobject GetApplicationContext();
 
 // Finds the class named |class_name| and returns it.
 // Use this method instead of invoking directly the JNI FindClass method (to
 // prevent leaking local references).
 // This method triggers a fatal assertion if the class could not be found.
 // Use HasClass if you need to check whether the class exists.
 BASE_EXPORT ScopedJavaLocalRef<jclass> GetClass(JNIEnv* env,
                                                 const char* class_name);
 
-// Returns true iff the class |class_name| could be found.
-BASE_EXPORT bool HasClass(JNIEnv* env, const char* class_name);
-
 // This class is a wrapper for JNIEnv Get(Static)MethodID.
 class BASE_EXPORT MethodID {
  public:
   enum Type {
     TYPE_STATIC,
     TYPE_INSTANCE,
   };
 
   // Returns the method ID for the method with the specified name and signature.
   // This method triggers a fatal assertion if the method could not be found.
   template<Type type>
   static jmethodID Get(JNIEnv* env,
                        jclass clazz,
                        const char* method_name,
                        const char* jni_signature);
 
   // The caller is responsible to zero-initialize |atomic_method_id|.
   // It's fine to simultaneously call this on multiple threads referencing the
   // same |atomic_method_id|.
   template<Type type>
   static jmethodID LazyGet(JNIEnv* env,
                            jclass clazz,
                            const char* method_name,
                            const char* jni_signature,
                            base::subtle::AtomicWord* atomic_method_id);
 };
 
-// Gets the method ID from the class name. Clears the pending Java exception
-// and returns NULL if the method is not found. Caches results. Note that
-// MethodID::Get() above avoids a class lookup, but does not cache 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.
-BASE_EXPORT jmethodID GetMethodIDFromClassName(JNIEnv* env,
-                                               const char* class_name,
-                                               const char* method,
-                                               const char* jni_signature);
-
-// Gets the field ID for a class field.
-// This method triggers a fatal assertion if the field could not be found.
-BASE_EXPORT jfieldID GetFieldID(JNIEnv* env,
-                                const JavaRef<jclass>& clazz,
-                                const char* field_name,
-                                const char* jni_signature);
-
-// Returns true if |clazz| as a field with the given name and signature.
-// TODO(jcivelli): Determine whether we explicitly have to pass the environment.
-BASE_EXPORT bool HasField(JNIEnv* env,
-                          const JavaRef<jclass>& clazz,
-                          const char* field_name,
-                          const char* jni_signature);
-
-// Gets the field ID for a static class field.
-// This method triggers a fatal assertion if the field could not be found.
-BASE_EXPORT jfieldID GetStaticFieldID(JNIEnv* env,
-                                      const JavaRef<jclass>& clazz,
-                                      const char* field_name,
-                                      const char* jni_signature);
-
 // Returns true if an exception is pending in the provided JNIEnv*.
 BASE_EXPORT bool HasException(JNIEnv* env);
 
 // If an exception is pending in the provided JNIEnv*, this function clears it
 // and returns true.
 BASE_EXPORT bool ClearException(JNIEnv* env);
 
 // This function will call CHECK() macro if there's any pending exception.
 BASE_EXPORT void CheckException(JNIEnv* env);
 
 }  // namespace android
 }  // namespace base
 
 #endif  // BASE_ANDROID_JNI_ANDROID_H_