Pass v8_postmortem_support to gyp/gn bridge.

Also change fetch_deps.py to no longer be a no-op and rename
Main function for importing from other scripts.

R=machenbach@chromium.org

Bug: v8:6105
Change-Id: I067a212827316248f60e97ff27e9bb2dc20addfd
Reviewed-on: https://chromium-review.googlesource.com/860007Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50522}

src/v8.gyp

@@ -2619,6 +2619,7 @@
             'v8_use_snapshot=<(v8_use_snapshot)',
             'v8_optimized_debug=<(v8_optimized_debug)',
             'v8_enable_disassembler=<(v8_enable_disassembler)',
+            'v8_postmortem_support=<(v8_postmortem_support)',
           ],
         },
       ],

tools/node/fetch_deps.py

@@ -60,7 +60,14 @@ def EnsureGit(v8_path):
                         cwd=v8_path)
   return True
 
-def FetchDeps(v8_path, depot_tools):
+def FetchDeps(v8_path):
+  # Verify path.
+  v8_path = os.path.abspath(v8_path)
+  assert os.path.isdir(v8_path)
+
+  # Check out depot_tools if necessary.
+  depot_tools = node_common.EnsureDepotTools(v8_path, True)
+
   temporary_git = EnsureGit(v8_path)
   try:
     print "Fetching dependencies."
@@ -76,20 +83,10 @@ def FetchDeps(v8_path, depot_tools):
   finally:
     if temporary_git:
       node_common.UninitGit(v8_path)
-
-def Main(v8_path):
-  # Verify paths.
-  v8_path = os.path.abspath(v8_path)
-  assert os.path.isdir(v8_path)
-
-  # Check out depot_tools if necessary.
-  depot_tools = node_common.EnsureDepotTools(v8_path, True)
-
-  # Fetch dependencies with gclient.
-  FetchDeps(v8_path, depot_tools)
+    # Clean up .gclient_entries file.
+    gclient_entries = os.normpath(os.path.join(v8_path, os.pardir, ".gclient_entries"))
+    if os.path.isfile(gclient_entries):
+      os.remove(gclient_entries)
 
 if __name__ == "__main__":
-  if len(sys.argv) > 2 and sys.argv[2] == "force":
-    Main(sys.argv[1])
-  else:
-    print "Disabled for now unless 'force' is passed as second argument."
+  FetchDeps(sys.argv[1])