Allow chromedriver to install an extension and get all installed extension IDs.

chrome/browser/automation/testing_automation_provider.h

Index: chrome/browser/automation/testing_automation_provider.h
diff --git a/chrome/browser/automation/testing_automation_provider.h b/chrome/browser/automation/testing_automation_provider.h
index 3402685b1c331b5407352fc9159a2ba1d0f50b25..42471a6a1ae4390d16590568e3ed31b49bfb3254 100644
--- a/chrome/browser/automation/testing_automation_provider.h
+++ b/chrome/browser/automation/testing_automation_provider.h
@@ -632,10 +632,14 @@ class TestingAutomationProvider : public AutomationProvider,
                     base::DictionaryValue* args,
                     IPC::Message* reply_message);
 
+  // Install the given unpacked/packed extension.
+  // Uses the JSON interface for input/output.
+  void InstallExtension(base::DictionaryValue* args,
+                        IPC::Message* reply_message);
+
   // Get info about all intalled extensions.
   // Uses the JSON interface for input/output.
-  void GetExtensionsInfo(Browser* browser,
-                         base::DictionaryValue* args,
+  void GetExtensionsInfo(base::DictionaryValue* args,
                          IPC::Message* reply_message);
 
   // Uninstalls the extension with the given id.