Remove dead code and update sample output in gen_input_methods.py.

This script is used for on-the-fly autogen of C++ code from legacy
input_methods.txt [1] config file that's mostly obsolete and on track
for full deprecation. This cleanup is in prep for trimming the script
to just what's still really in use nowadays from input_methods.txt.

[1] https://source.chromium.org/chromium/chromium/src/+/master:chromeos/ime/input_methods.txt;drc=5ab33d25bc676b63e4afbcfade6f9265a5f5a3ea

Bug: 1134526,1134465
Change-Id: Id8b235958deaee0f2d935f8e384af9c4e0cc19c7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2568923Reviewed-by: Yuichiro Hanada <yhanada@chromium.org>
Reviewed-by: Darren Shen <shend@chromium.org>
Reviewed-by: My Nguyen <myy@chromium.org>
Commit-Queue: Bao-Duy Tran <tranbaoduy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833085}

chromeos/ime/gen_input_methods.py

@@ -15,7 +15,7 @@ Run it like:
 
 It will produce output that looks like:
 
-// This file is automatically generated by gen_input_methods.py
+// Automatically generated by gen_input_methods.py
 #ifndef CHROMEOS_IME_INPUT_METHODS_H_
 #define CHROMEOS_IME_INPUT_METHODS_H_
 
@@ -25,7 +25,7 @@ namespace input_method {
 struct InputMethodsInfo {
   const char* input_method_id;
   const char* language_code;
-  const char* xkb_keyboard_id;
+  const char* xkb_layout_id;
   const char* indicator;
   bool is_login_keyboard;
 };
@@ -64,12 +64,9 @@ struct InputMethodsInfo {
 };
 const InputMethodsInfo kInputMethods[] = {
 """
-
-CPP_FORMAT = '#if %s\n'
 ENGINE_FORMAT = ('  {"%(input_method_id)s", "%(language_code)s", ' +
                  '"%(xkb_layout_id)s", "%(indicator)s", ' +
                  '%(is_login_keyboard)s},\n')
-
 OUTPUT_FOOTER = """
 };
 
@@ -90,11 +87,7 @@ def CreateEngineHeader(engines):
   output = []
   output.append(OUTPUT_HEADER)
   for engine in engines:
-    if 'if' in engine:
-      output.append(CPP_FORMAT % engine['if'])
     output.append(ENGINE_FORMAT % engine)
-    if 'if' in engine:
-      output.append('#endif\n')
   output.append(OUTPUT_FOOTER)
 
   return "".join(output)
@@ -102,7 +95,7 @@ def CreateEngineHeader(engines):
 
 def main(argv):
   if len(argv) != 3:
-    print 'Usage: gen_input_methods.py [allowlist] [output]'
+    print 'Usage: gen_input_methods.py [input_methods.txt] [output]'
     sys.exit(1)
   engines = []
   for line in fileinput.input(sys.argv[1]):