Remove now-unnecessary .obj() in Java method calls.

media/midi/midi_device_android.cc

Index: media/midi/midi_device_android.cc
diff --git a/media/midi/midi_device_android.cc b/media/midi/midi_device_android.cc
index fec90b9e1b35e704bbe49b3f30d94ba496b15a10..a9c758488ec373d75a5d53171ce1d37005e07eb1 100644
--- a/media/midi/midi_device_android.cc
+++ b/media/midi/midi_device_android.cc
@@ -52,19 +52,19 @@ MidiDeviceAndroid::~MidiDeviceAndroid() {}
 std::string MidiDeviceAndroid::GetManufacturer() {
   JNIEnv* env = base::android::AttachCurrentThread();
   return ConvertMaybeJavaString(
-      env, Java_MidiDeviceAndroid_getManufacturer(env, raw_device_.obj()));
+      env, Java_MidiDeviceAndroid_getManufacturer(env, raw_device_));
 }
 
 std::string MidiDeviceAndroid::GetProductName() {
   JNIEnv* env = base::android::AttachCurrentThread();
   return ConvertMaybeJavaString(
-      env, Java_MidiDeviceAndroid_getProduct(env, raw_device_.obj()));
+      env, Java_MidiDeviceAndroid_getProduct(env, raw_device_));
 }
 
 std::string MidiDeviceAndroid::GetDeviceVersion() {
   JNIEnv* env = base::android::AttachCurrentThread();
   return ConvertMaybeJavaString(
-      env, Java_MidiDeviceAndroid_getVersion(env, raw_device_.obj()));
+      env, Java_MidiDeviceAndroid_getVersion(env, raw_device_));
 }
 
 }  // namespace midi