Handle termination/crashes of an extension hosted in the ExtensionDialog.

chrome/browser/extensions/component_loader.cc

Index: chrome/browser/extensions/component_loader.cc
diff --git a/chrome/browser/extensions/component_loader.cc b/chrome/browser/extensions/component_loader.cc
index fc6ee612ff6ea7d8b683af64242859fe2149f635..227bf3875c96a4e59c2214fbed8880de6548c854 100644
--- a/chrome/browser/extensions/component_loader.cc
+++ b/chrome/browser/extensions/component_loader.cc
@@ -125,6 +125,17 @@ const Extension* ComponentLoader::AddOrReplace(const FilePath& path) {
   return Add(manifest.release(), absolute_path);
 }
 
+void ComponentLoader::Reload(const std::string& extension_id) {
+  for (RegisteredComponentExtensions::iterator it =
+         component_extensions_.begin(); it != component_extensions_.end();
+         ++it) {
+    if (GenerateId(it->manifest) == extension_id) {
+      Load(*it);
+      break;
+    }
+  }
+}
+
 const Extension* ComponentLoader::Load(const ComponentExtensionInfo& info) {
   int flags = Extension::REQUIRE_KEY;
   // TODO(abarth): We should REQUIRE_MODERN_MANIFEST_VERSION once we've updated