Add GN files for chrome_elf

Review URL: https://codereview.chromium.org/832583007

Cr-Commit-Position: refs/heads/master@{#312814}
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 765ab79..06573181 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -648,15 +648,15 @@
     deps += [
       "//chrome:version_header",
       "//chrome/installer/util:strings",
+      "//chrome_elf",
+      "//chrome_elf:constants",
+      "//chrome_elf:dll_hash",
       "//google_update",
       "//third_party/iaccessible2",
       "//third_party/isimpledom",
       "//third_party/wtl",
 
       #"chrome_process_finder",  TODO(GYP)
-      #"../chrome_elf/chrome_elf.gyp:chrome_elf",  TODO(GYP)
-      #"../chrome_elf/chrome_elf.gyp:chrome_elf_constants",  TODO(GYP)
-      #"../chrome_elf/chrome_elf.gyp:dll_hash",  TODO(GYP)
       "//ui/metro_viewer",
       "//win8:metro_viewer",
     ]