[WIP] Add SharedMemoryTracker to dump base::SharedMemory usage

base/memory/shared_memory_handle_win.cc

Index: base/memory/shared_memory_handle_win.cc
diff --git a/base/memory/shared_memory_handle_win.cc b/base/memory/shared_memory_handle_win.cc
index a2ff91abd2c6c7cc7e2651e8ac90cf152dd5ad50..233e8a0d562d4443c37f3073c5cddb924b0e8377 100644
--- a/base/memory/shared_memory_handle_win.cc
+++ b/base/memory/shared_memory_handle_win.cc
@@ -76,4 +76,15 @@ bool SharedMemoryHandle::OwnershipPassesToIPC() const {
   return ownership_passes_to_ipc_;
 }
 
+bool GetIDFromSharedMemoryHandle(const SharedMemoryHandle& handle,
+                                 SharedMemoryHandleID* id) {
+  // TODO(hajimehoshi): Implement this.
+  return true;
+}
+
+std::string GetSharedMemoryHandleIDString(const SharedMemoryHandleID& id) {
+  // TODO(hajimehoshi): Implement this.
+  return "";
+}
+
 }  // namespace base