[Android] Change jni_gen_dir to jni_gen_package for jni_generator.

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index 0b369ea85195a687b69700fb87db5eea23e8831f..431434eee695e9ace3c63af9998731829e83c096 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -1396,7 +1396,7 @@
           'target_name': 'media_player_jni_headers',
           'type': 'none',
           'variables': {
-            'jni_gen_dir': 'media',
+            'jni_gen_package': 'media',
             'input_java_class': 'android/media/MediaPlayer.class',
             'input_jar_file': '<(android_sdk)/android.jar',
           },
@@ -1413,7 +1413,7 @@
             'base/android/java/src/org/chromium/media/MediaPlayerListener.java',
           ],
           'variables': {
-            'jni_gen_dir': 'media',
+            'jni_gen_package': 'media',
           },
           'includes': [ '../build/jni_generator.gypi' ],
         },
@@ -1421,7 +1421,7 @@
           'target_name': 'camera_jni_headers',
           'type': 'none',
           'variables': {
-            'jni_gen_dir': 'media',
+            'jni_gen_package': 'media',
             'input_java_class': 'android/hardware/Camera.class',
             'input_jar_file': '<(android_sdk)/android.jar',
           },
@@ -1437,7 +1437,7 @@
             'base/android/java/src/org/chromium/media/VideoCapture.java',
           ],
           'variables': {
-            'jni_gen_dir': 'media',
+            'jni_gen_package': 'media',
           },
           'includes': [ '../build/jni_generator.gypi' ],
         },
@@ -1445,7 +1445,7 @@
           'target_name': 'media_codec_jni_headers',
           'type': 'none',
           'variables': {
-            'jni_gen_dir': 'media',
+            'jni_gen_package': 'media',
             'input_java_class': 'android/media/MediaCodec.class',
             'input_jar_file': '<(android_sdk)/android.jar',
           },
@@ -1455,7 +1455,7 @@
           'target_name': 'media_format_jni_headers',
           'type': 'none',
           'variables': {
-            'jni_gen_dir': 'media',
+            'jni_gen_package': 'media',
             'input_java_class': 'android/media/MediaFormat.class',
             'input_jar_file': '<(android_sdk)/android.jar',
           },