Fix gyp build.

NOTRY=true
NOTREECHECKS=true
TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1806273002

Cr-Commit-Position: refs/heads/master@{#34850}

src/snapshot/mksnapshot.cc

@@ -111,7 +111,6 @@ class SnapshotWriter {
 
 char* GetExtraCode(char* filename, const char* description) {
   if (filename == NULL || strlen(filename) == 0) return NULL;
-  if (strcmp(filename, "-") == 0) return NULL;
   ::printf("Loading script for %s: %s\n", description, filename);
   FILE* file = base::OS::FOpen(filename, "rb");
   if (file == NULL) {

tools/gyp/v8.gyp

@@ -31,8 +31,8 @@
     'v8_code': 1,
     'v8_random_seed%': 314159265,
     'v8_vector_stores%': 0,
-    'embed_script%': "-",
-    'warmup_script%': "-",
+    'embed_script%': "",
+    'warmup_script%': "",
     'v8_extra_library_files%': [],
     'v8_experimental_extra_library_files%': [],
     'mksnapshot_exec': '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)mksnapshot<(EXECUTABLE_SUFFIX)',