Add packages to optimize svgs dynamically

These packages will be used to dynamically optimize SVG images
during the build.

R=jacktfranklin@chromium.org

Bug: 1216402
Change-Id: I04e95aa7d79c9d67beaf8a7861182c52b16b7d0f
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2939992
Reviewed-by: Jack Franklin <jacktfranklin@chromium.org>
Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
diff --git a/node_modules/css-tree/lib/tokenizer/const.js b/node_modules/css-tree/lib/tokenizer/const.js
new file mode 100644
index 0000000..e0f8869
--- /dev/null
+++ b/node_modules/css-tree/lib/tokenizer/const.js
@@ -0,0 +1,40 @@
+// CSS Syntax Module Level 3
+// https://www.w3.org/TR/css-syntax-3/
+var TYPE = {
+    EOF: 0,                 // <EOF-token>
+    Ident: 1,               // <ident-token>
+    Function: 2,            // <function-token>
+    AtKeyword: 3,           // <at-keyword-token>
+    Hash: 4,                // <hash-token>
+    String: 5,              // <string-token>
+    BadString: 6,           // <bad-string-token>
+    Url: 7,                 // <url-token>
+    BadUrl: 8,              // <bad-url-token>
+    Delim: 9,               // <delim-token>
+    Number: 10,             // <number-token>
+    Percentage: 11,         // <percentage-token>
+    Dimension: 12,          // <dimension-token>
+    WhiteSpace: 13,         // <whitespace-token>
+    CDO: 14,                // <CDO-token>
+    CDC: 15,                // <CDC-token>
+    Colon: 16,              // <colon-token>     :
+    Semicolon: 17,          // <semicolon-token> ;
+    Comma: 18,              // <comma-token>     ,
+    LeftSquareBracket: 19,  // <[-token>
+    RightSquareBracket: 20, // <]-token>
+    LeftParenthesis: 21,    // <(-token>
+    RightParenthesis: 22,   // <)-token>
+    LeftCurlyBracket: 23,   // <{-token>
+    RightCurlyBracket: 24,  // <}-token>
+    Comment: 25
+};
+
+var NAME = Object.keys(TYPE).reduce(function(result, key) {
+    result[TYPE[key]] = key;
+    return result;
+}, {});
+
+module.exports = {
+    TYPE: TYPE,
+    NAME: NAME
+};