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

chrome/browser/android/accessibility/font_size_prefs_android.cc

Index: chrome/browser/android/accessibility/font_size_prefs_android.cc
diff --git a/chrome/browser/android/accessibility/font_size_prefs_android.cc b/chrome/browser/android/accessibility/font_size_prefs_android.cc
index d0d446ce6e1c61a348e4525293dbbd0ad43839d9..f271db4f21d431d77f5c43978396a03395043e70 100644
--- a/chrome/browser/android/accessibility/font_size_prefs_android.cc
+++ b/chrome/browser/android/accessibility/font_size_prefs_android.cc
@@ -72,11 +72,11 @@ jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
 void FontSizePrefsAndroid::OnFontScaleFactorChanged() {
   JNIEnv* env = base::android::AttachCurrentThread();
   float factor = GetFontScaleFactor(env, java_ref_);
-  Java_FontSizePrefs_onFontScaleFactorChanged(env, java_ref_.obj(), factor);
+  Java_FontSizePrefs_onFontScaleFactorChanged(env, java_ref_, factor);
 }
 
 void FontSizePrefsAndroid::OnForceEnableZoomChanged() {
   JNIEnv* env = base::android::AttachCurrentThread();
   bool enabled = GetForceEnableZoom(env, java_ref_);
-  Java_FontSizePrefs_onForceEnableZoomChanged(env, java_ref_.obj(), enabled);
+  Java_FontSizePrefs_onForceEnableZoomChanged(env, java_ref_, enabled);
 }