Fix some grammar in sidestep_resolver.cc

sandbox/src/sidestep_resolver.cc

 // Copyright (c) 2006-2008 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.
 
 #include "sandbox/src/sidestep_resolver.h"
 
 #include "base/win/pe_image.h"
 #include "sandbox/src/sandbox_nt_util.h"
 #include "sandbox/src/sidestep/preamble_patcher.h"
 
@@ skipping 57 matching lines @@
 }
 
 size_t SidestepResolverThunk::GetThunkSize() const {
   return GetInternalThunkSize() + kSizeOfSidestepStub;
 }
 
 // This is basically a wrapper around the normal sidestep patch that extends
 // the thunk to use a chained interceptor. It uses the fact that
 // SetInternalThunk generates the code to pass as the first parameter whatever
 // it receives as original_function; we let SidestepResolverThunk set this value
-// to it's saved code, and then we change it to our thunk data.
+// to its saved code, and then we change it to our thunk data.
 NTSTATUS SmartSidestepResolverThunk::Setup(const void* target_module,
                                            const void* interceptor_module,
                                            const char* target_name,
                                            const char* interceptor_name,
                                            const void* interceptor_entry_point,
                                            void* thunk_storage,
                                            size_t storage_bytes,
                                            size_t* storage_used) {
   if (storage_bytes < GetThunkSize())
     return STATUS_BUFFER_TOO_SMALL;
@@ skipping 102 matching lines @@
   DCHECK_NT(base);
   DCHECK_NT(return_address);
 
   base::win::PEImage pe(base);
   if (pe.GetImageSectionFromAddr(return_address))
     return true;
   return false;
 }
 
 }  // namespace sandbox