Remove the js minifier

V8 is almost completely JS-free. There's no need to ship the minifier
any more.

Bug: v8:7624,v8:5505,v8:4240,v8:4235,v8:4188,v8:1557
Change-Id: Iee15bf68c66bac27a67fe70e10b1edd4dcef89d1
Reviewed-on: https://chromium-review.googlesource.com/c/1386146Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58392}

BUILD.gn

@@ -720,12 +720,6 @@ action("js2c") {
 
   script = "tools/js2c.py"
 
-  # The script depends on this other script, this rule causes a rebuild if it
-  # changes.
-  inputs = [
-    "tools/jsmin.py",
-  ]
-
   # NOSORT
   sources = [
     "src/js/macros.py",
@@ -756,12 +750,6 @@ action("js2c_extras") {
 
   script = "tools/js2c.py"
 
-  # The script depends on this other script, this rule causes a rebuild if it
-  # changes.
-  inputs = [
-    "tools/jsmin.py",
-  ]
-
   sources = v8_extra_library_files
 
   outputs = [
@@ -787,12 +775,6 @@ action("js2c_experimental_extras") {
 
   script = "tools/js2c.py"
 
-  # The script depends on this other script, this rule causes a rebuild if it
-  # changes.
-  inputs = [
-    "tools/jsmin.py",
-  ]
-
   sources = v8_experimental_extra_library_files
 
   outputs = [

test/cctest/BUILD.gn

@@ -416,12 +416,6 @@ action("resources") {
 
   script = "../../tools/js2c.py"
 
-  # The script depends on this other script, this rule causes a rebuild if it
-  # changes.
-  inputs = [
-    "../../tools/jsmin.py",
-  ]
-
   # NOSORT
   sources = [
     "../../tools/splaytree.js",

tools/js2c.py

@@ -33,7 +33,6 @@
 
 import os, re
 import optparse
-import jsmin
 import textwrap
 
 
@@ -343,7 +342,6 @@ def BuildFilterChain(macro_filename, message_template_file):
     ExpandInlineMacros,
     ExpandInlineConstants,
     Validate,
-    jsmin.JavaScriptMinifier().JSMinify
   ])
 
   def chain(f1, f2):

tools/v8_presubmit.py

@@ -447,7 +447,6 @@ class SourceProcessor(SourceFileProcessor):
                        'fasta.js',
                        'injected-script.cc',
                        'injected-script.h',
-                       'jsmin.py',
                        'libraries.cc',
                        'libraries-empty.cc',
                        'lua_binarytrees.js',