Fix typo in comment ("ammount").

ipc/ipc_channel.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 IPC_IPC_CHANNEL_H_
 #define IPC_IPC_CHANNEL_H_
 
 #include <string>
 
 #if defined(OS_POSIX)
@@ skipping 72 matching lines @@
     HELLO_MESSAGE_TYPE = kuint16max  // Maximum value of message type (uint16),
                                      // to avoid conflicting with normal
                                      // message types, which are enumeration
                                      // constants starting from 0.
   };
 
   // The maximum message size in bytes. Attempting to receive a message of this
   // size or bigger results in a channel error.
   static const size_t kMaximumMessageSize = 128 * 1024 * 1024;
 
-  // Ammount of data to read at once from the pipe.
+  // Amount of data to read at once from the pipe.
   static const size_t kReadBufferSize = 4 * 1024;
 
   // Initialize a Channel.
   //
   // |channel_handle| identifies the communication Channel. For POSIX, if
   // the file descriptor in the channel handle is != -1, the channel takes
   // ownership of the file descriptor and will close it appropriately, otherwise
   // it will create a new descriptor internally.
   // |mode| specifies whether this Channel is to operate in server mode or
   // client mode.  In server mode, the Channel is responsible for setting up the
@@ skipping 105 matching lines @@
 
  private:
   // PIMPL to which all channel calls are delegated.
   class ChannelImpl;
   ChannelImpl *channel_impl_;
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_H_