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..2327e65becfd0fc3af6b14b981164b66e8d75680 100644
--- a/sandbox/win/src/win_utils.h
+++ b/sandbox/win/src/win_utils.h
@@ -112,6 +112,10 @@ 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.
+void* GetProcessBaseAddress(HANDLE process);
+
 }  // namespace sandbox
 
 // Resolves a function name in NTDLL to a function pointer. The second parameter