Add $ref support to policy schema

components/policy/core/common/generate_policy_source_unittest.cc

Index: components/policy/core/common/generate_policy_source_unittest.cc
diff --git a/components/policy/core/common/generate_policy_source_unittest.cc b/components/policy/core/common/generate_policy_source_unittest.cc
index a2b14624690e970f207c620e0d92928dd708268f..8cf27ee731b286c2643c39b9ff5a51456bd8b0ee 100644
--- a/components/policy/core/common/generate_policy_source_unittest.cc
+++ b/components/policy/core/common/generate_policy_source_unittest.cc
@@ -83,6 +83,22 @@ TEST(GeneratePolicySource, ChromeSchemaData) {
     EXPECT_EQ(base::Value::TYPE_STRING, it.schema().type());
   }
   EXPECT_TRUE(*next == NULL);
+
+#if defined(OS_CHROMEOS)
+  subschema = schema.GetKnownProperty(key::kPowerManagementIdleSettings);
+  ASSERT_TRUE(subschema.valid());
+
+  subschema = subschema.GetKnownProperty("Battery");
+  ASSERT_TRUE(subschema.valid());
+
+  subschema = subschema.GetKnownProperty("Delays");
+  ASSERT_TRUE(subschema.valid());
+
+  EXPECT_TRUE(subschema.GetKnownProperty("ScreenDim").valid());
+  EXPECT_TRUE(subschema.GetKnownProperty("ScreenOff").valid());
+  EXPECT_TRUE(subschema.GetKnownProperty("IdleWarning").valid());
+  EXPECT_TRUE(subschema.GetKnownProperty("Idle").valid());

[Joao da Silva, 2014/04/08 15:02:10]

Let's have a more strict test for this: check that GetKnownProperty("Battery")
equals GetKnownProperty("Delays"). You'll need to add a helper function in this
test that compares if two Schema objects are the same.

2 Schema objects are equal if:
- they are both invalid, OR:
  - they have the same type(), AND:
    - if the type() is LIST, then the schemas from GetItems() are equal too
    - if the type() is DICTIONARY, then:
      - have 2 iterators and iterate both at the same time; at each step they
must have equal keys and schemas
      -  GetAdditionalProperties() is also equal (maybe both are invalid)

[binjin, 2014/04/09 11:00:36]

Done.

+#endif
 }
 
 TEST(GeneratePolicySource, PolicyDetails) {