Add a Pepper IDL generator to the JSON schema compiler.

tools/json_schema_compiler/compiler.py

Index: tools/json_schema_compiler/compiler.py
diff --git a/tools/json_schema_compiler/compiler.py b/tools/json_schema_compiler/compiler.py
index 3759b0a172325da235a369efc5fc65b8ca839ca3..21281fcdabfb1292bd0f8eb09519e2978061d519 100755
--- a/tools/json_schema_compiler/compiler.py
+++ b/tools/json_schema_compiler/compiler.py
@@ -26,11 +26,12 @@ from cpp_type_generator import CppTypeGenerator
 from dart_generator import DartGenerator
 import json_schema
 from model import Model
+from ppapi_generator import PpapiGenerator
 from schema_loader import SchemaLoader
 
 # Names of supported code generators, as specified on the command-line.
 # First is default.
-GENERATORS = ['cpp', 'cpp-bundle', 'dart']
+GENERATORS = ['cpp', 'cpp-bundle', 'dart', 'ppapi']
 
 def GenerateSchema(generator,
                    filenames,
@@ -106,6 +107,12 @@ def GenerateSchema(generator,
       ('%s.dart' % namespace.unix_name, DartGenerator(
           dart_overrides_dir))
     ]
+  elif generator == 'ppapi':
+    generator = PpapiGenerator()
+    generators = [
+      (os.path.join('api', 'ppb_%s.idl' % namespace.unix_name),
+       generator.idl_generator),
+    ]
   else:
     raise Exception('Unrecognised generator %s' % generator)