Enforce the 'requirements' field in manifests.

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index 11e7842a981f6bf5e92142765f4f59333d86e36d..03c05633a45b6a9f565be199a828a759791e86de 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -2128,7 +2128,8 @@ void ExtensionService::UpdateActiveExtensionsInCrashReporter() {
 void ExtensionService::OnExtensionInstalled(
     const Extension* extension,
     bool from_webstore,
-    const syncer::StringOrdinal& page_ordinal) {
+    const syncer::StringOrdinal& page_ordinal,
+    bool has_requirement_errors) {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   // Ensure extension is deleted unless we transfer ownership.
@@ -2175,6 +2176,20 @@ void ExtensionService::OnExtensionInstalled(
     }
   }
 
+  // Unsupported requirements overrides the management policy.
+  if (has_requirement_errors) {
+    initial_enable = false;
+    extension_prefs_->AddDisableReason(
+        id, Extension::DISABLE_UNSUPPORTED_REQUIREMENT);
+  // If the extension was disabled because of unsupported requirements but
+  // now supports all requirements after an update and there are not other
+  // disable reasons, enable it.
+  } else if (extension_prefs_->GetDisableReasons(id) ==
+      Extension::DISABLE_UNSUPPORTED_REQUIREMENT) {
+    initial_enable = true;
+    extension_prefs_->ClearDisableReasons(id);
+  }
+
   int include_mask = INCLUDE_ENABLED;
   include_mask |= INCLUDE_DISABLED;
   // Do not record the install histograms for upgrades.