Restructure sandbox code to reduce dependencies pulled in by intercept code.

sandbox/win/src/sandbox_nt_util.h

Index: sandbox/win/src/sandbox_nt_util.h
diff --git a/sandbox/win/src/sandbox_nt_util.h b/sandbox/win/src/sandbox_nt_util.h
index e5d45fa2f2ae24060e46a19e1462c356c5c033a5..fc7127e936611e9c64151ba82fa95b73b5f3f547 100644
--- a/sandbox/win/src/sandbox_nt_util.h
+++ b/sandbox/win/src/sandbox_nt_util.h
@@ -94,14 +94,6 @@ enum RequiredAccess {
 // write)
 bool ValidParameter(void* buffer, size_t size, RequiredAccess intent);
 
-
-// Copies data from a user buffer to our buffer. Returns the operation status.
-NTSTATUS CopyData(void* destination, const void* source, size_t bytes);
-
-// Copies the name from an object attributes.
-NTSTATUS AllocAndCopyName(const OBJECT_ATTRIBUTES* in_object,
-                          wchar_t** out_name, uint32* attributes, HANDLE* root);
-
 // Initializes our ntdll level heap
 bool InitHeap();
 
@@ -136,11 +128,6 @@ UNICODE_STRING* GetImageInfoFromModule(HMODULE module, uint32* flags);
 // be freed with a placement delete (see GetImageNameFromModule example).
 UNICODE_STRING* GetBackingFilePath(PVOID address);
 
-// Returns the last component of a path that contains the module name.
-// It will return NULL if the path ends with the path separator. The returned
-// buffer must be freed with a placement delete (see GetImageNameFromModule
-// example).
-UNICODE_STRING* ExtractModuleName(const UNICODE_STRING* module_path);
 
 // Returns true if the parameters correspond to a dll mapped as code.
 bool IsValidImageSection(HANDLE section, PVOID *base, PLARGE_INTEGER offset,
@@ -179,6 +166,12 @@ class AutoProtectMemory {
 bool IsSupportedRenameCall(FILE_RENAME_INFORMATION* file_info, DWORD length,
                            uint32 file_info_class);
 
+// Writes |length| bytes from the provided |buffer| into the address space of
+// |child_process|, at the specified |address|, preserving the original write
+// protection attributes. Returns true on success.
+bool WriteProtectedChildMemory(HANDLE child_process, void* address,
+                               const void* buffer, size_t length);
+
 }  // namespace sandbox