[torque] Emit full codesearch links for source positions

Change-Id: I80affc4c813dff2a42afcdcea60e3856eaf346aa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3272576Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77841}

src/torque/source-positions.h

@@ -109,7 +109,8 @@ inline std::string PositionAsString(SourcePosition pos) {
 }
 
 inline std::ostream& operator<<(std::ostream& out, SourcePosition pos) {
-  return out << SourceFileMap::PathFromV8Root(pos.source)
+  return out << "https://source.chromium.org/chromium/chromium/src/+/main:v8/"
+             << SourceFileMap::PathFromV8Root(pos.source)
              << "?l=" << (pos.start.line + 1)
              << "&c=" << (pos.start.column + 1);
 }

tools/gen-postmortem-metadata.py

@@ -447,7 +447,8 @@ def load_objects_from_file(objfilename, checktypes):
         in_torque_fulldef = False
         continue
 
-    line = re.sub('//.*', '', line.strip());
+    pre = line.strip()
+    line = re.sub('// .*', '', line.strip());
 
     if (in_insttype):
       typestr += line;