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 f095f9e76d3658de7a7e348f1711eaf449258a02..7926e45231e83bbed828e6b22c63f0436c425439 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -2100,7 +2100,8 @@ void ExtensionService::UpdateActiveExtensionsInCrashReporter() {
 void ExtensionService::OnExtensionInstalled(
     const Extension* extension,
     bool from_webstore,
-    const StringOrdinal& page_ordinal) {
+    const StringOrdinal& page_ordinal,
+    const std::vector<std::string>& requirement_errors) {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   // Ensure extension is deleted unless we transfer ownership.
@@ -2147,6 +2148,18 @@ void ExtensionService::OnExtensionInstalled(
     }
   }
 
+  // Unsupported requirements overrides the management policy.
+  if (!requirement_errors.empty()) {
+    initial_enable = false;
+  // If the extension was disabled because of unsupported requirements but
+  // now supports all requirements after an update, enable it and clear
+  // the errors. The case where the extension has different requirement errors
+  // will be handled later.
+  } else if (extension_prefs_->HasUnsupportedRequirements(id)) {
+    initial_enable = true;
+    extension_prefs_->ClearUnsupportedRequirements(id);
+  }
+
   // Do not record the install histograms for upgrades.
   if (!GetExtensionByIdInternal(extension->id(), true, true, false)) {
     UMA_HISTOGRAM_ENUMERATION("Extensions.InstallType",
@@ -2167,6 +2180,12 @@ void ExtensionService::OnExtensionInstalled(
       from_webstore,
       page_ordinal);
 
+  if (!requirement_errors.empty()) {
+    extension_prefs_->SetDisableReason(
+        id, Extension::DISABLE_UNSUPPORTED_REQUIREMENT);
+    extension_prefs_->SetUnsupportedRequirements(id, requirement_errors);
+  }
+
   // Unpacked extensions default to allowing file access, but if that has been
   // overridden, don't reset the value.
   if (Extension::ShouldAlwaysAllowFileAccess(extension->location()) &&