jni: Pass method parameters as JavaParamRef in printing.

printing/printing_context_android.cc

 // Copyright 2013 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.
 
 #include "printing/printing_context_android.h"
 
 #include <vector>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
@@ skipping 85 matching lines @@
 
   if (is_scripted) {
     Java_PrintingContext_showPrintDialog(env, j_printing_context_.obj());
   } else {
     Java_PrintingContext_pageCountEstimationDone(env,
                                                  j_printing_context_.obj(),
                                                  max_pages);
   }
 }
 
-void PrintingContextAndroid::AskUserForSettingsReply(JNIEnv* env,
-                                                     jobject obj,
-                                                     jboolean success) {
+void PrintingContextAndroid::AskUserForSettingsReply(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj,
+    jboolean success) {
   if (!success) {
     // TODO(cimamoglu): Differentiate between FAILED And CANCEL.
     callback_.Run(FAILED);
     return;
   }
 
   // We use device name variable to store the file descriptor.  This is hacky
   // but necessary. Since device name is not necessary for the upstream
   // printing code for Android, this is harmless.
   int fd = Java_PrintingContext_getFileDescriptor(env,
@@ skipping 11 matching lines @@
   int dpi = Java_PrintingContext_getDpi(env, j_printing_context_.obj());
   int width = Java_PrintingContext_getWidth(env, j_printing_context_.obj());
   int height = Java_PrintingContext_getHeight(env, j_printing_context_.obj());
   width = Round(ConvertUnitDouble(width, kInchToMil, 1.0) * dpi);
   height = Round(ConvertUnitDouble(height, kInchToMil, 1.0) * dpi);
   SetSizes(&settings_, dpi, width, height);
 
   callback_.Run(OK);
 }
 
-void PrintingContextAndroid::ShowSystemDialogDone(JNIEnv* env,
-                                                  jobject obj) {
+void PrintingContextAndroid::ShowSystemDialogDone(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj) {
   // Settings are not updated, callback is called only to unblock javascript.
   callback_.Run(CANCEL);
 }
 
 PrintingContext::Result PrintingContextAndroid::UseDefaultSettings() {
   DCHECK(!in_print_job_);
 
   ResetSettings();
   settings_.set_dpi(kDefaultPdfDpi);
   gfx::Size physical_size = GetPdfPaperSizeDeviceUnits();
@@ skipping 99 matching lines @@
   // Intentional No-op.
   return NULL;
 }
 
 // static
 bool PrintingContextAndroid::RegisterPrintingContext(JNIEnv* env) {
    return RegisterNativesImpl(env);
 }
 
 }  // namespace printing