Add support for an optional "requirements" section in extension/app manifests.

chrome/common/extensions/extension_manifests_unittest.cc

Index: chrome/common/extensions/extension_manifests_unittest.cc
diff --git a/chrome/common/extensions/extension_manifests_unittest.cc b/chrome/common/extensions/extension_manifests_unittest.cc
index dd1f4f8a6cb02b576b7cb1bb7a5b5cdbe3825dd6..99393722af9b2ec771a4efab6e27bf3619f7f5a1 100644
--- a/chrome/common/extensions/extension_manifests_unittest.cc
+++ b/chrome/common/extensions/extension_manifests_unittest.cc
@@ -207,7 +207,9 @@ TEST_F(ExtensionManifestTest, InitFromValueInvalid) {
     {"init_invalid_locale_empty.json", errors::kInvalidDefaultLocale},
     {"init_invalid_min_chrome_invalid.json",
         errors::kInvalidMinimumChromeVersion},
-    {"init_invalid_chrome_version_too_low.json", errors::kChromeVersionTooLow}
+    {"init_invalid_chrome_version_too_low.json", errors::kChromeVersionTooLow},
+    {"init_invalid_requirements_1.json", errors::kInvalidRequirements},
+    {"init_invalid_requirements_2.json", errors::kInvalidRequirement}
   };
 
   RunTestcases(testcases, arraysize(testcases));
@@ -248,6 +250,9 @@ TEST_F(ExtensionManifestTest, InitFromValueValid) {
   // Test a hosted app with a minimum_chrome_version.
   extension = LoadAndExpectSuccess("init_valid_app_minimum_chrome.json");
 
+  // Test a hosted app with a requirements section.
+  extension = LoadAndExpectSuccess("init_valid_app_requirements.json");
+
   // Verify empty permission settings are considered valid.
   LoadAndExpectSuccess("init_valid_permissions_empty.json");