Revert of discardable_memory: Using mojo IPC to replace Chrome IPC

content/ppapi_plugin/ppapi_thread.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 CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_
 #define CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 18 matching lines @@
 
 #if defined(OS_WIN)
 #include "base/win/scoped_handle.h"
 #endif
 
 namespace base {
 class CommandLine;
 class FilePath;
 }
 
-namespace discardable_memory {
-class ClientDiscardableSharedMemoryManager;
-}
-
 namespace IPC {
 struct ChannelHandle;
 }
 
 namespace content {
 
 class PpapiBlinkPlatformImpl;
 
 #if defined(COMPILER_MSVC)
 // See explanation for other RenderViewHostImpl which is the same issue.
@@ skipping 125 matching lines @@
   // The BlinkPlatformImpl implementation.
   std::unique_ptr<PpapiBlinkPlatformImpl> blink_platform_impl_;
 
 #if defined(OS_WIN)
   // Caches the handle to the peer process if this is a broker.
   base::win::ScopedHandle peer_handle_;
 #endif
 
   variations::ChildProcessFieldTrialSyncer field_trial_syncer_;
 
-  std::unique_ptr<discardable_memory::ClientDiscardableSharedMemoryManager>
-      discardable_shared_memory_manager_;
-
   DISALLOW_IMPLICIT_CONSTRUCTORS(PpapiThread);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_