Update comments of the Pepper networking APIs.

ppapi/cpp/dev/host_resolver_dev.h

 // Copyright 2013 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_HOST_RESOLVER_DEV_H_
 #define PPAPI_CPP_DEV_HOST_RESOLVER_DEV_H_
 
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/dev/ppb_host_resolver_dev.h"
 #include "ppapi/cpp/dev/net_address_dev.h"
 #include "ppapi/cpp/pass_ref.h"
 #include "ppapi/cpp/resource.h"
 #include "ppapi/cpp/var.h"
 
 namespace pp {
 
 class CompletionCallback;
 class InstanceHandle;
 
+/// The <code>HostResolver_Dev</code> class supports host name resolution.
+///
+/// Permissions: In order to run <code>Resolve()</code>, apps permission
+/// <code>socket</code> with subrule <code>resolve-host</code> is required.
+/// For more details about network communication permissions, please see:
+/// http://developer.chrome.com/apps/app_network.html
 class HostResolver_Dev : public Resource {
  public:
+  /// Default constructor for creating an is_null()
+  /// <code>HostResolver_Dev</code> object.
   HostResolver_Dev();
 
+  /// A contructor used to create a <code>HostResolver_Dev</code> object.
+  ///
+  /// @param[in] instance The instance with which this resource will be
+  /// associated.
   explicit HostResolver_Dev(const InstanceHandle& instance);
 
+  /// A constructor used when you have received a <code>PP_Resource</code> as a
+  /// return value that has already been added 1 ref for you.
+  ///
+  /// @param[in] resource A <code>PPB_HostResolver_Dev</code> resource.
   HostResolver_Dev(PassRef, PP_Resource resource);
 
+  /// The copy constructor for <code>HostResolver_Dev</code>.
+  ///
+  /// @param[in] other A reference to another <code>HostResolver_Dev</code>.
   HostResolver_Dev(const HostResolver_Dev& other);
 
+  /// The destructor.
   virtual ~HostResolver_Dev();
 
+  /// The assign operator for <code>HostResolver_Dev</code>.
+  ///
+  /// @param[in] other A reference to another <code>HostResolver_Dev</code>.
+  ///
+  /// @return A reference to this <code>HostResolver_Dev</code> object.
   HostResolver_Dev& operator=(const HostResolver_Dev& other);
 
-  // Returns true if the required interface is available.
+  /// Static function for determining whether the browser supports the required
+  /// <code>PPB_HostResolver_Dev</code> interface.
+  ///
+  /// @return true if the interface is available, false otherwise.
   static bool IsAvailable();
 
+  /// Requests to resolve a host name. When the call completes successully, the
+  /// results can be retrieved by <code>GetCanonicalName()</code>,
+  /// <code>GetNetAddressCount()</code> and <code>GetNetAddress()</code>.
+  ///
+  /// @param[in] host The host name (or IP address literal) to resolve.
+  /// @param[in] port The port number to be set in the resulting network
+  /// addresses.
+  /// @param[in] hint A <code>PP_HostResolver_Hint_Dev</code> structure
+  /// providing hints for host resolution.
+  /// @param[in] callback A <code>CompletionCallback</code> to be called upon
+  /// completion.
+  ///
+  /// @return An int32_t containing an error code from <code>pp_errors.h</code>.
+  /// <code>PP_ERROR_NOACCESS</code> will be returned if the caller doesn't have
+  /// required permissions. <code>PP_ERROR_NAME_NOT_RESOLVED</code> will be
+  /// returned if the host name couldn't be resolved.
   int32_t Resolve(const char* host,
                   uint16_t port,
                   const PP_HostResolver_Hint_Dev& hint,
                   const CompletionCallback& callback);
+
+  /// Gets the canonical name of the host.
+  ///
+  /// @return A string <code>Var</code> on success, which is an empty string
+  /// if <code>PP_HOSTRESOLVER_FLAGS_CANONNAME</code> is not specified when
+  /// calling <code>Resolve()</code>; an undefined <code>Var</code> if there
+  /// is a pending <code>Resolve()</code> call or the previous
+  /// <code>Resolve()</code> call failed.
   Var GetCanonicalName() const;
+
+  /// Gets the number of network addresses.
+  ///
+  /// @return The number of available network addresses on success; 0 if there
+  /// is a pending <code>Resolve()</code> call or the previous
+  /// <code>Resolve()</code> call failed.
   uint32_t GetNetAddressCount() const;
+
+  /// Gets a network address.
+  ///
+  /// @param[in] index An index indicating which address to return.
+  ///
+  /// @return A <code>NetAddress_Dev</code> object. The object will be null
+  /// (i.e., is_null() returns true) if there is a pending
+  /// <code>Resolve()</code> call or the previous <code>Resolve()</code> call
+  /// failed, or the specified index is out of range.
   NetAddress_Dev GetNetAddress(uint32_t index) const;
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_DEV_HOST_RESOLVER_DEV_H_