Show gpu process stats in about:tcmalloc

content/common/child_process_messages.h

Index: content/common/child_process_messages.h
diff --git a/content/common/child_process_messages.h b/content/common/child_process_messages.h
index 363c556a572d9766847b8b1fe0b74ae381d48162..a48067b72735947bcc23bef705b8174a38c24e20 100644
--- a/content/common/child_process_messages.h
+++ b/content/common/child_process_messages.h
@@ -92,6 +92,11 @@ IPC_MESSAGE_CONTROL1(ChildProcessMsg_GetChildProfilerData,
 // Sent to child processes to dump their handle table.
 IPC_MESSAGE_CONTROL0(ChildProcessMsg_DumpHandles)
 
+#if defined(USE_TCMALLOC)
+// Sent to child process to request tcmalloc stats.
+IPC_MESSAGE_CONTROL0(ChildProcessMsg_GetTcmallocStats)
+#endif
+
 ////////////////////////////////////////////////////////////////////////////////
 // Messages sent from the child process to the browser.
 
@@ -138,3 +143,9 @@ IPC_MESSAGE_CONTROL0(ChildProcessHostMsg_ReleaseCachedFonts)
 IPC_SYNC_MESSAGE_CONTROL1_1(ChildProcessHostMsg_SyncAllocateSharedMemory,
                             uint32 /* buffer size */,
                             base::SharedMemoryHandle)
+
+#if defined(USE_TCMALLOC)
+// Reply to ChildProcessMsg_GetTcmallocStats.
+IPC_MESSAGE_CONTROL1(ChildProcessHostMsg_TcmallocStats,
+                     std::string /* output */)
+#endif