Enable mmap and identity-based validation caching on pnacl-{llc,ld}.nexe

components/nacl/browser/nacl_browser.h

Index: components/nacl/browser/nacl_browser.h
diff --git a/components/nacl/browser/nacl_browser.h b/components/nacl/browser/nacl_browser.h
index 93dcb4230cf12b94ee098ba4052beb05e75f2668..8e3e9eff3f4dac2bfd5bdca2997700f6df82a9c8 100644
--- a/components/nacl/browser/nacl_browser.h
+++ b/components/nacl/browser/nacl_browser.h
@@ -28,9 +28,10 @@ namespace nacl {
 static const int kGdbDebugStubPortUnknown = -1;
 static const int kGdbDebugStubPortUnused = 0;
 
-// Open an immutable executable file that can be mmapped.
+// Open an immutable executable file that can be mmapped (or a read-only file).
 // This function should only be called on a thread that can perform file IO.
-base::File OpenNaClExecutableImpl(const base::FilePath& file_path);
+base::File OpenNaClReadExecImpl(const base::FilePath& file_path,
+                                bool is_executable);
 
 // Represents shared state for all NaClProcessHost objects in the browser.
 class NaClBrowser {