jni: Pass method parameters as JavaParamRef in chrome/browser/ui.

chrome/browser/ui/android/toolbar/toolbar_model_android.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_UI_ANDROID_TOOLBAR_TOOLBAR_MODEL_ANDROID_H_
 #define CHROME_BROWSER_UI_ANDROID_TOOLBAR_TOOLBAR_MODEL_ANDROID_H_
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_weak_ref.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/ui/toolbar/toolbar_model_delegate.h"
 #include "components/toolbar/toolbar_model.h"
 
 namespace content {
 class WebContents;
 }  // content
 
 // Owns a ToolbarModel and provides a way for Java to interact with it.
 class ToolbarModelAndroid : public ToolbarModelDelegate {
  public:
   explicit ToolbarModelAndroid(JNIEnv* env, jobject jdelegate);
   ~ToolbarModelAndroid() override;
 
-  void Destroy(JNIEnv* env, jobject obj);
+  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
   base::android::ScopedJavaLocalRef<jstring> GetText(
       JNIEnv* env,
-      jobject obj);
+      const base::android::JavaParamRef<jobject>& obj);
   base::android::ScopedJavaLocalRef<jstring> GetCorpusChipText(
       JNIEnv* env,
-      jobject obj);
-  jboolean WouldReplaceURL(JNIEnv* env, jobject obj);
+      const base::android::JavaParamRef<jobject>& obj);
+  jboolean WouldReplaceURL(JNIEnv* env,
+                           const base::android::JavaParamRef<jobject>& obj);
 
   // ToolbarDelegate:
   content::WebContents* GetActiveWebContents() const override;
 
   static bool RegisterToolbarModelAndroid(JNIEnv* env);
 
  private:
   scoped_ptr<ToolbarModel> toolbar_model_;
   JavaObjectWeakGlobalRef weak_java_delegate_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ToolbarModelAndroid);
 };
 
 #endif  // CHROME_BROWSER_UI_ANDROID_TOOLBAR_TOOLBAR_MODEL_ANDROID_H_