[tools] Remove chrome-specific gdbinit code

Change-Id: Ie38c77aafbe75f61fc568f1013ca5815d6750364
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1662289
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62284}

tools/gdbinit

@@ -191,25 +191,6 @@ def add_debug_file_directory(dir):
       "set debug-file-directory %s" % ":".join(current_dirs), to_string=True)
 
 
-def load_libcxx_pretty_printers(src_dir):
-  libcxx_pretty_printers = os.path.join(src_dir, 'third_party',
-                                        'libcxx-pretty-printers')
-  if not os.path.isdir(libcxx_pretty_printers):
-    return
-  sys.path.insert(1, libcxx_pretty_printers)
-  from printers import register_libcxx_printers
-  register_libcxx_printers(None)
-
-
-def load_gdb_chrome(src_dir):
-  tools_gdb = os.path.join(src_dir, 'tools', 'gdb')
-
-  sys.path.insert(1, tools_gdb)
-  import gdb_chrome
-
-  gdb.execute('source %s' % os.path.join(tools_gdb, 'viewg.gdb'))
-
-
 def newobj_handler(event):
   global compile_dirs
   compile_dir = os.path.dirname(event.new_objfile.filename)
@@ -227,24 +208,10 @@ def newobj_handler(event):
   # https://crbug.com/603286#c35
   add_debug_file_directory(compile_dir)
 
-  git = subprocess.Popen(
-      ['git', '-C', compile_dir, 'rev-parse', '--show-toplevel'],
-      stdout=subprocess.PIPE,
-      stderr=subprocess.PIPE)
-  src_dir, _ = git.communicate()
-  if git.returncode:
-    return
-  src_dir = str(src_dir).rstrip()
-
-  load_libcxx_pretty_printers(src_dir)
-
-  load_gdb_chrome(src_dir)
-
-
 # Event hook for newly loaded objfiles.
 # https://sourceware.org/gdb/onlinedocs/gdb/Events-In-Python.html
 gdb.events.new_objfile.connect(newobj_handler)
 
-gdb.execute("set environment CHROMIUM_GDBINIT_SOURCED=1")
+gdb.execute("set environment V8_GDBINIT_SOURCED=1")
 
 end