Implement new method to get process base address in Windows sandbox.

sandbox/win/src/win_utils.h

Index: sandbox/win/src/win_utils.h
diff --git a/sandbox/win/src/win_utils.h b/sandbox/win/src/win_utils.h
index 13dc569c10ac90cefa853ae715f1f5c5bf6f225a..b88b08c63c15ca14c20305e0e7e95e04c6d64dad 100644
--- a/sandbox/win/src/win_utils.h
+++ b/sandbox/win/src/win_utils.h
@@ -112,6 +112,14 @@ bool IsPipe(const base::string16& path);
 // Converts a NTSTATUS code to a Win32 error code.
 DWORD GetLastErrorFromNtStatus(NTSTATUS status);
 
+// Returns the address of the main exe module in memory taking in account
+// address space layout randomization. While it will work on running processes
+// it's recommended to only call this for a suspended process. Ideally also
+// a process which has not been started. There's a slim chance that a process
+// could map its own executables file multiple times, but this is pretty
+// unlikely to occur in practice.
+void* GetProcessBaseAddress(HANDLE process);
+
 }  // namespace sandbox
 
 // Resolves a function name in NTDLL to a function pointer. The second parameter