Make AudioParameters a class instead of a struct

content/browser/renderer_host/render_message_filter.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_RENDERER_HOST_RENDER_MESSAGE_FILTER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_MESSAGE_FILTER_H_
 #pragma once
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include <string>
 #include <vector>
 
 #include "base/file_path.h"
 #include "base/memory/linked_ptr.h"
 #include "base/message_loop_helpers.h"
 #include "base/shared_memory.h"
 #include "base/string16.h"
 #include "build/build_config.h"
 #include "content/browser/renderer_host/resource_dispatcher_host_impl.h"
 #include "content/public/browser/browser_message_filter.h"
+#include "media/base/channel_layout.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPopupType.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/surface/transport_dib.h"
 
 class DOMStorageContextImpl;
 class PluginServiceImpl;
 class RenderWidgetHelper;
 struct FontDescriptor;
 struct ViewHostMsg_CreateWindow_Params;
 
@@ skipping 131 matching lines @@
   void OnDownloadUrl(const IPC::Message& message,
                      const GURL& url,
                      const GURL& referrer,
                      const string16& suggested_name);
   void OnCheckNotificationPermission(const GURL& source_origin,
                                      int* permission_level);
 
   void OnGetCPUUsage(int* cpu_usage);
 
   void OnGetHardwareBufferSize(uint32* buffer_size);
-  void OnGetHardwareInputSampleRate(double* sample_rate);
-  void OnGetHardwareSampleRate(double* sample_rate);
-  void OnGetHardwareInputChannelCount(uint32* channels);
+  void OnGetHardwareInputSampleRate(int* sample_rate);
+  void OnGetHardwareSampleRate(int* sample_rate);
+  void OnGetHardwareInputChannelLayout(ChannelLayout* layout);
 
   // Used to ask the browser to allocate a block of shared memory for the
   // renderer to send back data in, since shared memory can't be created
   // in the renderer on POSIX due to the sandbox.
   void OnAllocateSharedMemory(uint32 buffer_size,
                               base::SharedMemoryHandle* handle);
   void OnResolveProxy(const GURL& url, IPC::Message* reply_msg);
 
   // Browser side transport DIB allocation
   void OnAllocTransportDIB(size_t size,
@@ skipping 74 matching lines @@
   base::TimeTicks cpu_usage_sample_time_;
   // Records the last sampled CPU usage in percents.
   int cpu_usage_;
   // Used for sampling CPU usage of the renderer process.
   scoped_ptr<base::ProcessMetrics> process_metrics_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderMessageFilter);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_MESSAGE_FILTER_H_