Change trusted shared memory interface to match audio....

ppapi/cpp/dev/buffer_dev.h

 // Copyright (c) 2010 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 PPAPI_CPP_DEV_BUFFER_DEV_H_
 #define PPAPI_CPP_DEV_BUFFER_DEV_H_
 
 #include "ppapi/cpp/resource.h"
 
 namespace pp {
 
 class Buffer_Dev : public Resource {
  public:
   // Creates an is_null() Buffer object.
   Buffer_Dev();
 
   Buffer_Dev(const Buffer_Dev& other);
 
   // Allocates a new Buffer in the browser with the given size. The
   // resulting object will be is_null() if the allocation failed.
-  explicit Buffer_Dev(int32_t size);
+  explicit Buffer_Dev(uint32_t size);
 
   ~Buffer_Dev();
 
   Buffer_Dev& operator=(const Buffer_Dev& other);
   void swap(Buffer_Dev& other);
 
-  int32_t size() const { return size_; }
+  uint32_t size() const { return size_; }
   void* data() const { return data_; }
 
  private:
   void* data_;
-  int32_t size_;
+  uint32_t size_;
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_DEV_BUFFER_DEV_H_