jni: Pass method parameters as JavaParamRef in content.

content/browser/android/content_view_render_view.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_ANDROID_CONTENT_VIEW_RENDER_VIEW_H_
 #define CONTENT_BROWSER_ANDROID_CONTENT_VIEW_RENDER_VIEW_H_
 
 #include "base/android/jni_weak_ref.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 11 matching lines @@
 class ContentViewRenderView : public CompositorClient {
  public:
   // Registers the JNI methods for ContentViewRender.
   static bool RegisterContentViewRenderView(JNIEnv* env);
 
   ContentViewRenderView(JNIEnv* env,
                         jobject obj,
                         gfx::NativeWindow root_window);
 
   // Methods called from Java via JNI -----------------------------------------
-  void Destroy(JNIEnv* env, jobject obj);
-  void SetCurrentContentViewCore(JNIEnv* env, jobject obj,
-                                 jlong native_content_view_core);
-  void SurfaceCreated(JNIEnv* env, jobject obj);
-  void SurfaceDestroyed(JNIEnv* env, jobject obj);
-  void SurfaceChanged(JNIEnv* env, jobject obj,
-                      jint format, jint width, jint height, jobject surface);
-  void SetOverlayVideoMode(JNIEnv* env, jobject obj, bool enabled);
-  void SetNeedsComposite(JNIEnv* env, jobject obj);
+  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+  void SetCurrentContentViewCore(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      jlong native_content_view_core);
+  void SurfaceCreated(JNIEnv* env,
+                      const base::android::JavaParamRef<jobject>& obj);
+  void SurfaceDestroyed(JNIEnv* env,
+                        const base::android::JavaParamRef<jobject>& obj);
+  void SurfaceChanged(JNIEnv* env,
+                      const base::android::JavaParamRef<jobject>& obj,
+                      jint format,
+                      jint width,
+                      jint height,
+                      const base::android::JavaParamRef<jobject>& surface);
+  void SetOverlayVideoMode(JNIEnv* env,
+                           const base::android::JavaParamRef<jobject>& obj,
+                           bool enabled);
+  void SetNeedsComposite(JNIEnv* env,
+                         const base::android::JavaParamRef<jobject>& obj);
 
   // TODO(yusufo): Remove this once the compositor code is
   // refactored to use a unified system.
-  jlong GetUIResourceProvider(JNIEnv* env, jobject obj);
+  jlong GetUIResourceProvider(JNIEnv* env,
+                              const base::android::JavaParamRef<jobject>& obj);
 
   // CompositorClient implementation
   void UpdateLayerTreeHost() override;
   void OnSwapBuffersCompleted(int pending_swap_buffers) override;
 
  private:
   ~ContentViewRenderView() override;
 
   void InitCompositor();
 
   base::android::ScopedJavaGlobalRef<jobject> java_obj_;
 
   scoped_ptr<content::Compositor> compositor_;
 
   gfx::NativeWindow root_window_;
   int current_surface_format_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentViewRenderView);
 };
 
 
 
 }
 
 #endif  // CONTENT_BROWSER_ANDROID_CONTENT_VIEW_RENDER_VIEW_H_