Cleanup: Remove unused SharedMemory ctor.

base/memory/shared_memory_mac.cc

Index: base/memory/shared_memory_mac.cc
diff --git a/base/memory/shared_memory_mac.cc b/base/memory/shared_memory_mac.cc
index a54d0bac73938458ad16136003f0737556cfb473..6f152f7d302e7c0728ef57e6f76d74140ee1820d 100644
--- a/base/memory/shared_memory_mac.cc
+++ b/base/memory/shared_memory_mac.cc
@@ -207,20 +207,6 @@ SharedMemory::SharedMemory(const SharedMemoryHandle& handle, bool read_only)
       read_only_(read_only),
       requested_size_(0) {}
 
-SharedMemory::SharedMemory(const SharedMemoryHandle& handle,
-                           bool read_only,
-                           ProcessHandle process)
-    : mapped_memory_mechanism_(SharedMemoryHandle::POSIX),
-      readonly_mapped_file_(-1),
-      mapped_size_(0),
-      memory_(NULL),
-      read_only_(read_only),
-      requested_size_(0) {
-  // We don't handle this case yet (note the ignored parameter); let's die if
-  // someone comes calling.
-  NOTREACHED();
-}
-
 SharedMemory::~SharedMemory() {
   Unmap();
   Close();