[libfuzzer] proto-based renderer fuzzer draft

content/test/fuzzer/html_tree.proto

Index: content/test/fuzzer/html_tree.proto
diff --git a/content/test/fuzzer/html_tree.proto b/content/test/fuzzer/html_tree.proto
new file mode 100644
index 0000000000000000000000000000000000000000..7e8e40a86c58a92e1b8ff7f0557967c4027cf4f3
--- /dev/null
+++ b/content/test/fuzzer/html_tree.proto
@@ -0,0 +1,252 @@
+syntax = "proto3";
+
+message Document {
+  Tag root = 1;
+}
+
+message Tag {
+  Name name = 1;
+  repeated Attribute attrs = 2;
+  repeated Tag subtags = 3;
+
+  enum Name {
+    A = 0;
+    ABBR = 1;
+    ADDRESS = 2;
+    AREA = 3;
+    ARTICLE = 4;
+    ASIDE = 5;
+    AUDIO = 6;
+    B = 7;
+    BASE = 8;
+    BDI = 9;
+    BDO = 10;
+    BLOCKQUOTE = 11;
+    BODY = 12;
+    BR = 13;
+    BUTTON = 14;
+    CANVAS = 15;
+    CAPTION = 16;
+    CITE = 17;
+    CODE = 18;
+    COL = 19;
+    COLGROUP = 20;
+    DATA = 21;
+    DATALIST = 22;
+    DD = 23;
+    DEL = 24;
+    DFN = 25;
+    DIV = 26;
+    DL = 27;
+    DT = 28;
+    EM = 29;
+    EMBED = 30;
+    FIELDSET = 31;
+    FIGCAPTION = 32;
+    FIGURE = 33;
+    FOOTER = 34;
+    FORM = 35;
+    H1 = 36;
+    H2 = 37;
+    H3 = 38;
+    H4 = 39;
+    H5 = 40;
+    H6 = 41;
+    HEAD = 42;
+    HEADER = 43;
+    HR = 44;
+    HTML = 45;
+    I = 46;
+    IFRAME = 47;
+    IMG = 48;
+    INPUT = 49;
+    INS = 50;
+    KBD = 51;
+    KEYGEN = 52;
+    LABEL = 53;
+    LEGEND = 54;
+    LI = 55;
+    LINK = 56;
+    MAIN = 57;
+    MAP = 58;
+    MARK = 59;
+    META = 60;
+    METER = 61;
+    NAV = 62;
+    NOSCRIPT = 63;
+    OBJECT = 64;
+    OL = 65;
+    OPTGROUP = 66;
+    OPTION = 67;
+    OUTPUT = 68;
+    P = 69;
+    PARAM = 70;
+    PRE = 71;
+    PROGRESS = 72;
+    Q = 73;
+    RB = 74;
+    RP = 75;
+    RT = 76;
+    RTC = 77;
+    RUBY = 78;
+    S = 79;
+    SAMP = 80;
+    SCRIPT = 81;
+    SECTION = 82;
+    SELECT = 83;
+    SMALL = 84;
+    SOURCE = 85;
+    SPAN = 86;
+    STRONG = 87;
+    STYLE = 88;
+    SUB = 89;
+    SUP = 90;
+    TABLE = 91;
+    TBODY = 92;
+    TD = 93;
+    TEMPLATE = 94;
+    TEXTAREA = 95;
+    TFOOT = 96;
+    TH = 97;
+    THEAD = 98;
+    TIME = 99;
+    TITLE = 100;
+    TR = 101;
+    TRACK = 102;
+    U = 103;
+    UL = 104;
+    VAR = 105;
+    VIDEO = 106;
+    WBR = 107;
+  }
+}
+
+message Attribute {
+  Name name = 1;
+  Value value = 2;
+
+  message Value {
+    oneof value {
+      bool bool_value = 1;
+      uint64 uint_value = 2;
+      int64 int_value = 3;
+      double double_value = 4;
+
+      int64 px_value = 5;
+      uint32 pct_value = 6;
+    }
+  }
+
+  enum Name {
+    ACCEPT = 0;
+    ACCEPT_CHARSET = 1;
+    ACCESSKEY = 2;
+    ACTION = 3;
+    ALIGN = 4;
+    ALT = 5;
+    ASYNC = 6;
+    AUTOCOMPLETE = 7;
+    AUTOFOCUS = 8;
+    AUTOPLAY = 9;
+    AUTOSAVE = 10;
+    BGCOLOR = 11;
+    BORDER = 12;
+    BUFFERED = 13;
+    CHALLENGE = 14;
+    CHARSET = 15;
+    CHECKED = 16;
+    CITE = 17;
+    CLASS = 18;
+    CODE = 19;
+    CODEBASE = 20;
+    COLOR = 21;
+    COLS = 22;
+    COLSPAN = 23;
+    CONTENT = 24;
+    CONTENTEDITABLE = 25;
+    CONTEXTMENU = 26;
+    CONTROLS = 27;
+    DATA = 28;
+    DATETIME = 29;
+    DEFAULT = 30;
+    DEFER = 31;
+    DIR = 32;
+    DIRNAME = 33;
+    DISABLED = 34;
+    DOWNLOAD = 35;
+    DRAGGABLE = 36;
+    DROPZONE = 37;
+    ENCTYPE = 38;
+    FOR = 39;
+    FORM = 40;
+    FORMACTION = 41;
+    HEADERS = 42;
+    HEIGHT = 43;
+    HIDDEN = 44;
+    HIGH = 45;
+    HREF = 46;
+    HREFLANG = 47;
+    ICON = 48;
+    ID = 49;
+    ISMAP = 50;
+    ITEMPROP = 51;
+    KEYTYPE = 52;
+    KIND = 53;
+    LABEL = 54;
+    LANG = 55;
+    LANGUAGE = 56;
+    LIST = 57;
+    LOOP = 58;
+    LOW = 59;
+    MANIFEST = 60;
+    MAX = 61;
+    MAXLENGTH = 62;
+    MEDIA = 63;
+    METHOD = 64;
+    MIN = 65;
+    MULTIPLE = 66;
+    MUTED = 67;
+    NAME = 68;
+    NOVALIDATE = 69;
+    OPEN = 70;
+    OPTIMUM = 71;
+    PATTERN = 72;
+    PING = 73;
+    PLACEHOLDER = 74;
+    POSTER = 75;
+    PRELOAD = 76;
+    RADIOGROUP = 77;
+    READONLY = 78;
+    REL = 79;
+    REQUIRED = 80;
+    REVERSED = 81;
+    ROWS = 82;
+    ROWSPAN = 83;
+    SANDBOX = 84;
+    SCOPE = 85;
+    SCOPED = 86;
+    SEAMLESS = 87;
+    SELECTED = 88;
+    SHAPE = 89;
+    SIZE = 90;
+    SIZES = 91;
+    SPAN = 92;
+    SPELLCHECK = 93;
+    SRC = 94;
+    SRCDOC = 95;
+    SRCLANG = 96;
+    SRCSET = 97;
+    START = 98;
+    STEP = 99;
+    STYLE = 100;
+    SUMMARY = 101;
+    TABINDEX = 102;
+    TARGET = 103;
+    TITLE = 104;
+    TYPE = 105;
+    USEMAP = 106;
+    VALUE = 107;
+    WIDTH = 108;
+    WRAP = 109;
+  }
+}