Revert 186627

gpu/command_buffer/service/mailbox_manager.cc

Index: gpu/command_buffer/service/mailbox_manager.cc
===================================================================
--- gpu/command_buffer/service/mailbox_manager.cc	(revision 186756)
+++ gpu/command_buffer/service/mailbox_manager.cc	(working copy)
@@ -8,7 +8,6 @@
 
 #include "base/rand_util.h"
 #include "crypto/hmac.h"
-#include "gpu/command_buffer/common/mailbox.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "gpu/command_buffer/service/texture_definition.h"
 
@@ -20,10 +19,6 @@
   std::fill(signature, signature + sizeof(signature), 0);
 }
 
-MailboxName::MailboxName(const ::gpu::Mailbox& mailbox) {
-  std::copy(mailbox.name, mailbox.name + sizeof(mailbox.name), key);
-}
-
 MailboxManager::MailboxManager()
     : hmac_(crypto::HMAC::SHA256),
       textures_(std::ptr_fun(&MailboxManager::TargetNameLess)) {