gn: add TextMate syntax for Sublime Text 2/3

tools/gn/misc/GN.tmLanguage

Index: tools/gn/misc/GN.tmLanguage
diff --git a/tools/gn/misc/GN.tmLanguage b/tools/gn/misc/GN.tmLanguage
new file mode 100644
index 0000000000000000000000000000000000000000..8a0f8a245794419b55997b12a2243a63215c64bd
--- /dev/null
+++ b/tools/gn/misc/GN.tmLanguage
@@ -0,0 +1,102 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>fileTypes</key>
+  <array>
+    <string>gn</string>
+    <string>gni</string>
+  </array>
+  <key>name</key>
+  <string>GN</string>
+  <key>patterns</key>
+  <array>
+    <dict>
+      <key>comment</key>
+      <string>keywords</string>
+      <key>match</key>
+      <string>\b(?:if)\b</string>
+      <key>name</key>
+      <string>keyword.control.gn</string>
+    </dict>
+    <dict>
+      <key>comment</key>
+      <string>constants</string>
+      <key>match</key>
+      <string>\b(?:true|false)\b</string>
+      <key>name</key>
+      <string>constant.language.gn</string>
+    </dict>
+    <dict>
+      <key>comment</key>
+      <string>numbers</string>
+      <key>match</key>
+      <string>\b\d+\.?(?:\d+)?\b</string>
+      <key>name</key>
+      <string>constant.numeric.gn</string>
+    </dict>
+    <dict>
+      <key>comment</key>
+      <string>double quoted string</string>
+      <key>match</key>
+      <string>\"[^\"]*\"</string>
+      <key>name</key>
+      <string>string.quoted.double.gn</string>
+    </dict>
+    <dict>
+      <key>comment</key>
+      <string>comment</string>
+      <key>begin</key>
+      <string>#</string>
+      <key>end</key>
+      <string>$</string>
+      <key>name</key>
+      <string>comment.gn</string>
+    </dict>
+    <dict>
+      <key>comment</key>
+      <string>operators</string>
+      <key>match</key>
+      <string>(?:=|==|\+=|-=|\+|-)</string>
+      <key>name</key>
+      <string>keyword.operator.gn</string>
+    </dict>
+    <dict>
+      <key>comment</key>
+      <string>targets</string>
+      <key>match</key>
+      <string>\b(?:action|action_foreach|copy|executable|group|shared_library|source_set|static_library)\b</string>
+      <key>name</key>
+      <string>entity.name.tag.gn</string>
+    </dict>
+    <dict>
+      <key>comment</key>
+      <string>functions</string>
+      <key>match</key>
+      <string>\b(?:assert|config|declare_args|defined|exec_script|foreach|get_label_info|get_path_info|get_target_outputs|getenv|import|print|process_file_template|read_file|rebase_path|set_default_toolchain|set_defaults|set_sources_assignment_filter|template|tool|toolchain|toolchain_args|write_file)\b</string>
+      <key>name</key>
+      <string>entity.name.function.gn</string>
+    </dict>
+    <dict>
+      <key>comment</key>
+      <string>predefined variables</string>
+      <key>match</key>
+      <string>\b(?:current_cpu|current_os|current_toolchain|default_toolchain|host_cpu|host_os|python_path|root_build_dir|root_gen_dir|root_out_dir|target_cpu|target_gen_dir|target_os|target_out_dir)\b</string>
+      <key>name</key>
+      <string>variable.parameter.gn</string>
+    </dict>
+    <dict>
+      <key>comment</key>
+      <string>target variables</string>
+      <key>match</key>
+      <string>\b(?:all_dependent_configs|allow_circular_includes_from|args|cflags|cflags_c|cflags_cc|cflags_objc|cflags_objcc|check_includes|complete_static_lib|configs|data|data_deps|defines|depfile|deps|forward_dependent_configs_from|include_dirs|inputs|ldflags|lib_dirs|libs|output_extension|output_name|outputs|public|public_configs|public_deps|script|sources|testonly|visibility)\b</string>
+      <key>name</key>
+      <string>entity.other.attribute-name.gn</string>
+    </dict>
+  </array>
+  <key>scopeName</key>
+  <string>source.gn</string>
+  <key>uuid</key>
+  <string>DE419F8C-EC46-4824-87F3-732BD08694DC</string>
+</dict>
+</plist>