jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/android/java_exception_reporter.cc

Index: chrome/browser/android/java_exception_reporter.cc
diff --git a/chrome/browser/android/java_exception_reporter.cc b/chrome/browser/android/java_exception_reporter.cc
index 1d572e56adf5e07b3c6d3921b12068ea42b3bb0d..bfe57ee79c441d095015bbcbf11befa1b2650765 100644
--- a/chrome/browser/android/java_exception_reporter.cc
+++ b/chrome/browser/android/java_exception_reporter.cc
@@ -17,7 +17,9 @@ void InitJavaExceptionReporter() {
   Java_JavaExceptionReporter_installHandler(env);
 }
 
-void ReportJavaException(JNIEnv* env, jclass jcaller, jthrowable e) {
+void ReportJavaException(JNIEnv* env,
+                         const JavaParamRef<jclass>& jcaller,
+                         const JavaParamRef<jthrowable>& e) {
   // Set the exception_string in BuildInfo so that breakpad can read it.
   base::android::BuildInfo::GetInstance()->SetJavaExceptionInfo(
       base::android::GetJavaExceptionInfo(env, e));