Revert of discardable_memory: Using mojo IPC to replace Chrome IPC

content/browser/renderer_host/render_message_filter.cc

Index: content/browser/renderer_host/render_message_filter.cc
diff --git a/content/browser/renderer_host/render_message_filter.cc b/content/browser/renderer_host/render_message_filter.cc
index 518575d28d883e0774493f7345669dba1a0f89e0..89e04e207f4fc5e979f595edb24b13fb2ba5a81b 100644
--- a/content/browser/renderer_host/render_message_filter.cc
+++ b/content/browser/renderer_host/render_message_filter.cc
@@ -161,6 +161,8 @@
       BrowserGpuMemoryBufferManager::current();
   if (gpu_memory_buffer_manager)
     gpu_memory_buffer_manager->ProcessRemoved(render_process_id_);
+  discardable_memory::DiscardableSharedMemoryManager::current()->ClientRemoved(
+      render_process_id_);
 }
 
 bool RenderMessageFilter::OnMessageReceived(const IPC::Message& message) {
@@ -198,7 +200,11 @@
                         OnAllocatedSharedBitmap)
     IPC_MESSAGE_HANDLER(ChildProcessHostMsg_DeletedSharedBitmap,
                         OnDeletedSharedBitmap)
-
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(
+        ChildProcessHostMsg_SyncAllocateLockedDiscardableSharedMemory,
+        OnAllocateLockedDiscardableSharedMemory)
+    IPC_MESSAGE_HANDLER(ChildProcessHostMsg_DeletedDiscardableSharedMemory,
+                        OnDeletedDiscardableSharedMemory)
 #if defined(OS_LINUX)
     IPC_MESSAGE_HANDLER(ChildProcessHostMsg_SetThreadPriority,
                         OnSetThreadPriority)
@@ -363,6 +369,45 @@
   bitmap_manager_client_.ChildDeletedSharedBitmap(id);
 }
 
+void RenderMessageFilter::AllocateLockedDiscardableSharedMemoryOnFileThread(
+    uint32_t size,
+    discardable_memory::DiscardableSharedMemoryId id,
+    IPC::Message* reply_msg) {
+  base::SharedMemoryHandle handle;
+  discardable_memory::DiscardableSharedMemoryManager::current()
+      ->AllocateLockedDiscardableSharedMemoryForClient(
+          PeerHandle(), render_process_id_, size, id, &handle);
+  ChildProcessHostMsg_SyncAllocateLockedDiscardableSharedMemory::
+      WriteReplyParams(reply_msg, handle);
+  Send(reply_msg);
+}
+
+void RenderMessageFilter::OnAllocateLockedDiscardableSharedMemory(
+    uint32_t size,
+    discardable_memory::DiscardableSharedMemoryId id,
+    IPC::Message* reply_msg) {
+  BrowserThread::PostTask(
+      BrowserThread::FILE_USER_BLOCKING, FROM_HERE,
+      base::Bind(&RenderMessageFilter::
+                     AllocateLockedDiscardableSharedMemoryOnFileThread,
+                 this, size, id, reply_msg));
+}
+
+void RenderMessageFilter::DeletedDiscardableSharedMemoryOnFileThread(
+    discardable_memory::DiscardableSharedMemoryId id) {
+  discardable_memory::DiscardableSharedMemoryManager::current()
+      ->ClientDeletedDiscardableSharedMemory(id, render_process_id_);
+}
+
+void RenderMessageFilter::OnDeletedDiscardableSharedMemory(
+    discardable_memory::DiscardableSharedMemoryId id) {
+  BrowserThread::PostTask(
+      BrowserThread::FILE_USER_BLOCKING, FROM_HERE,
+      base::Bind(
+          &RenderMessageFilter::DeletedDiscardableSharedMemoryOnFileThread,
+          this, id));
+}
+
 #if defined(OS_LINUX)
 void RenderMessageFilter::SetThreadPriorityOnFileThread(
     base::PlatformThreadId ns_tid,