OTS: Adds more layout common table supports....

src/layout.h

Index: src/layout.h
===================================================================
--- src/layout.h	(revision 50)
+++ src/layout.h	(working copy)
@@ -12,6 +12,24 @@
 
 namespace ots {
 
+struct LookupTypeParser {
+  uint16_t type;
+  bool (*parse)(const OpenTypeFile *file, const uint8_t *data,
+                const size_t length);
+};
+
+bool ParseScriptListTable(const uint8_t *data, const size_t length,
+                          const uint16_t num_features);
+
+bool ParseFeatureListTable(const uint8_t *data, const size_t length,
+                           const uint16_t num_lookups,
+                           uint16_t* num_features);
+
+bool ParseLookupListTable(OpenTypeFile *file, const uint8_t *data,
+                          const size_t length, const size_t num_types,
+                          const LookupTypeParser* parsers,
+                          uint16_t *num_lookups);
+
 bool ParseClassDefTable(const uint8_t *data, size_t length,
                         const uint16_t num_glyphs,
                         const uint16_t num_classes);
@@ -19,6 +37,8 @@
 bool ParseCoverageTable(const uint8_t *data, size_t length,
                         const uint16_t num_glyphs);
 
+bool ParseDeviceTable(const uint8_t *data, size_t length);
+
 }  // namespace ots
 
 #endif  // OTS_LAYOUT_H_