Extension Storage API: expose storage quota information to extensions, via:

chrome/browser/extensions/settings/settings_frontend_unittest.cc

Index: chrome/browser/extensions/settings/settings_frontend_unittest.cc
diff --git a/chrome/browser/extensions/settings/settings_frontend_unittest.cc b/chrome/browser/extensions/settings/settings_frontend_unittest.cc
index e153ac3441bcd025fb5f0cf13eb008e1e79f1471..e77f2529308f28301c81d5a571b42311e69eb88b 100644
--- a/chrome/browser/extensions/settings/settings_frontend_unittest.cc
+++ b/chrome/browser/extensions/settings/settings_frontend_unittest.cc
@@ -9,11 +9,13 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/scoped_temp_dir.h"
+#include "base/string_number_conversions.h"
 #include "base/stringprintf.h"
 #include "chrome/browser/extensions/settings/settings_frontend.h"
 #include "chrome/browser/extensions/settings/settings_namespace.h"
 #include "chrome/browser/extensions/settings/settings_storage.h"
 #include "chrome/browser/extensions/settings/settings_test_util.h"
+#include "chrome/common/extensions/api/extension_api.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "content/test/test_browser_thread.h"
 
@@ -86,6 +88,8 @@ class ExtensionSettingsFrontendTest : public testing::Test {
     storage_factory_->Reset(new SettingsLeveldbStorage::Factory());
     frontend_.reset(
         SettingsFrontend::Create(storage_factory_.get(), profile_.get()));
+    // frontend_ needs a message loop to initialise.
+    MessageLoop::current()->RunAllPending();
   }
 
   ScopedTempDir temp_dir_;
@@ -305,4 +309,44 @@ TEST_F(ExtensionSettingsFrontendTest,
   MessageLoop::current()->RunAllPending();
 }
 
+// Returns an int given as a string in |dict| at |path|, or -1 if there is not
+// int located there.
+static int GetInteger(const DictionaryValue& dict, const std::string& path) {
+  int integer = -1;
+  {
+    std::string integer_as_string;
+    dict.GetString(path, &integer_as_string);
+    base::StringToInt(integer_as_string, &integer);
+  }
+  return integer;
+}
+
+TEST_F(ExtensionSettingsFrontendTest, QuotaLimitsMatchJson) {
+  const DictionaryValue* storage_api =
+      ExtensionAPI::GetInstance()->GetSchema("storage");
+  CHECK(storage_api);
+
+  EXPECT_EQ(
+      (int) SettingsFrontend::kSyncQuota.quota_bytes,
+      GetInteger(*storage_api,
+                 "properties.sync.properties.QUOTA_BYTES.value"));
+  EXPECT_EQ(
+      (int) SettingsFrontend::kSyncQuota.quota_bytes_per_item,
+      GetInteger(*storage_api,
+                 "properties.sync.properties.QUOTA_BYTES_PER_ITEM.value"));
+  EXPECT_EQ(
+      (int) SettingsFrontend::kSyncQuota.max_items,
+      GetInteger(*storage_api,
+                 "properties.sync.properties.MAX_ITEMS.value"));
+
+  EXPECT_EQ(
+      (int) SettingsFrontend::kLocalQuota.quota_bytes,
+      GetInteger(*storage_api,
+                 "properties.local.properties.QUOTA_BYTES.value"));
+  EXPECT_FALSE(storage_api->HasKey(
+      "properties.local.properties.QUOTA_BYTES_PER_ITEM.value"));
+  EXPECT_FALSE(storage_api->HasKey(
+      "properties.local.properties.MAX_ITEMS.value"));
+}
+
 }  // namespace extensions