Add support for references in different paths in apis

build/json_schema_compile.gypi

Index: build/json_schema_compile.gypi
diff --git a/build/json_schema_compile.gypi b/build/json_schema_compile.gypi
index d164748508f20afdcae34cbcfe14b22a6fb5b5b5..b42f09e7179b8fee5679a84f9fd8b53dc153434e 100644
--- a/build/json_schema_compile.gypi
+++ b/build/json_schema_compile.gypi
@@ -7,6 +7,8 @@
     # When including this gypi, the following variables must be set:
     #   schema_files:
     #     An array of json or idl files that comprise the api model.
+    #   schema_includes (optional):
+    #     An array of paths to include when searching for referenced objects.
     #   cc_dir:
     #     The directory to put the generated code in.
     #   root_namespace:
@@ -20,6 +22,7 @@
     'api_gen_dir': '<(DEPTH)/tools/json_schema_compiler',
     'api_gen': '<(api_gen_dir)/compiler.py',
     'impl_dir%': 'chrome/browser/extensions/api',
+    'schema_includes' : [],
   },
   'rules': [
     {
@@ -57,7 +60,8 @@
         '--destdir=<(SHARED_INTERMEDIATE_DIR)',
         '--namespace=<(root_namespace)',
         '--generator=cpp',
-        '--impl-dir=<(impl_dir)'
+        '--impl-dir=<(impl_dir)',
+        '--include=<(schema_includes)'
       ],
       'message': 'Generating C++ code from <(RULE_INPUT_PATH) json files',
       'process_outputs_as_sources': 1,
@@ -96,7 +100,8 @@
         '--destdir=<(SHARED_INTERMEDIATE_DIR)',
         '--namespace=<(root_namespace)',
         '--generator=cpp',
-        '--impl-dir=<(impl_dir)'
+        '--impl-dir=<(impl_dir)',
+        '--include=<(schema_includes)'
       ],
       'message': 'Generating C++ code from <(RULE_INPUT_PATH) IDL files',
       'process_outputs_as_sources': 1,