Change the DidChangeView update to take a new ViewChanged resource.

ppapi/cpp/instance.h

 // Copyright (c) 2011 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_INSTANCE_H_
 #define PPAPI_CPP_INSTANCE_H_
 
 /// @file
 /// This file defines the C++ wrapper for an instance.
 
 #include <map>
 #include <string>
 
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
+#include "ppapi/cpp/view.h"
 
 struct PP_InputEvent;
 
 /// The C++ interface to the Pepper API.
 namespace pp {
 
 class Graphics2D;
 class Graphics3D;
 class InputEvent;
 class Rect;
@@ skipping 56 matching lines @@
   /// argument values: "nacl_module" and "2".  The indices of these values
   /// match the indices of the corresponding names in <code>argn</code>.
   ///
   /// @return true on success. Returning false causes the instance to be
   /// instance to be deleted and no other functions to be called.
   virtual bool Init(uint32_t argc, const char* argn[], const char* argv[]);
 
   /// @{
   /// @name PPP_Instance methods for the module to override:
 
-  /// DidChangeView() is called when the position, the size, or the clip
-  /// rectangle of the element in the browser that corresponds to this
-  /// instance has changed.
+  /// DidChangeView() is called when the view information for the Instance
+  /// has changed. See the <code>View</code> object for information.
+  ///
+  /// Most implementations will want to check if the size and user visibility
+  /// changed, and either resize themselves or start/stop generating updates.
+  ///
+  /// You should not call the default implementation. For
+  /// backwards-compatibility, it will call the deprecated version of
+  /// DidChangeView below.
+  virtual void DidChangeView(const View& view);
+
+  /// Deprecated backwards-compatible version of <code>DidChangeView()</code>.
+  /// New code should derive from the version that takes a
+  /// <code>ViewChanged</code> object rather than this version. This function
+  /// is called by the default implementation of the newer
+  /// <code>DidChangeView</code> function for source compatibility with older
+  /// code.
   ///
   /// A typical implementation will check the size of the <code>position</code>
   /// argument and reallocate the graphics context when a different size is
   /// received. Note that this function will be called for scroll events where
   /// the size doesn't change, so you should always check that the size is
   /// actually different before doing any reallocations.
   ///
   /// @param[in] position The location on the page of the instance. The
   /// position is relative to the top left corner of the viewport, which changes
   /// as the page is scrolled. Generally the size of this value will be used to
@@ skipping 389 matching lines @@
  private:
   PP_Instance pp_instance_;
 
   typedef std::map<std::string, void*> InterfaceNameToObjectMap;
   InterfaceNameToObjectMap interface_name_to_objects_;
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_INSTANCE_H_