Move chrome.alarms API from chrome/ to extensions/.

This CL allows app_shell to use chrome.alarms.

Also it includes the following changes related to unit tests:
- Moved chrome.alarms tests to extensions/
- Moved a helper function CreateEmptyExtensionWithLocation()
  from extension_function_test_utils.h to api_test_utils.h.
- Moved CreateBackgroundPage() from extension_api_unittest.h to
  api_unittest.h.
- Creates WebContents for the extension that can be used to associate
  a RenderViewHost in extension unit tests.

BUG=443622

Review URL: https://codereview.chromium.org/789643004

Cr-Commit-Position: refs/heads/master@{#314040}

1 files changed, 0 insertions, 5 deletions

diff --git a/chrome/browser/extensions/extension_function_test_utils.h b/chrome/browser/extensions/extension_function_test_utils.h
index 3c10c61..f19d506 100644
--- a/chrome/browser/extensions/extension_function_test_utils.h
+++ b/chrome/browser/extensions/extension_function_test_utils.h
@@ -40,11 +40,6 @@ base::DictionaryValue* ToDictionary(base::Value* val);
 // If |val| is a list, return it as one, otherwise NULL.
 base::ListValue* ToList(base::Value* val);
 
-// Creates an extension instance with a specified location that can be attached
-// to an ExtensionFunction before running.
-scoped_refptr<extensions::Extension> CreateEmptyExtensionWithLocation(
-    extensions::Manifest::Location location);
-
 // Returns true if |val| contains privacy information, e.g. url,
 // title, and faviconUrl.
 bool HasPrivacySensitiveFields(base::DictionaryValue* val);