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

chrome/browser/automation/automation_provider_json.h

Index: chrome/browser/automation/automation_provider_json.h
diff --git a/chrome/browser/automation/automation_provider_json.h b/chrome/browser/automation/automation_provider_json.h
index 1ea31db5b268c2e0f0fd688ef503032c6b155e56..b1083261762396e62af08e4081caf267ba743892 100644
--- a/chrome/browser/automation/automation_provider_json.h
+++ b/chrome/browser/automation/automation_provider_json.h
@@ -14,7 +14,11 @@
 
 class AutomationProvider;
 class Browser;
+class Extension;
+class Profile;
+class RenderViewHost;
 class TabContents;
+class TabContentsWrapper;
 
 namespace base {
 class DictionaryValue;
@@ -48,6 +52,38 @@ class AutomationJSONReply {
   IPC::Message* message_;
 };
 
+// A unique ID that automation clients can use to refer to browser entities.
+// The ID contains its type so that:
+// 1) supplying an ID of the wrong type can be detected
+// 2) the client does not have to explicitly supply the type in case multiple
+// ID types can be accepted (e.g., can use a tab ID or extension popup ID for
+// executing javascript).
+class AutomationId {
+ public:
+  // This order should be preserved.
+  enum Type {
+    kInvalidType = -1,
+    kTypeTab = 0,
+    kTypeExtensionPopup
+  };
+
+  static bool FromValue(
+      base::Value* value, AutomationId* id, std::string* error);
+
+  AutomationId();
+  AutomationId(Type type, const std::string& id);
+
+  base::Value* ToValue() const;
+
+  bool is_valid() const;
+  Type type() const;
+  const std::string& id() const;
+
+ private:
+  Type type_;
+  std::string id_;
+};
+
 // Gets the browser specified by the given dictionary |args|. |args| should
 // contain a key 'windex' which refers to the index of the browser. Returns
 // true on success and sets |browser|. Otherwise, |error| will be set.
@@ -73,4 +109,15 @@ bool GetBrowserAndTabFromJSONArgs(base::DictionaryValue* args,
                                   TabContents** tab,
                                   std::string* error) WARN_UNUSED_RESULT;
 
+bool GetAutomationIdFromJSONArgs(
+    base::DictionaryValue* args,
+    AutomationId* id,
+    std::string* error) WARN_UNUSED_RESULT;
+
+bool GetRenderViewFromJSONArgs(
+    base::DictionaryValue* args,
+    Profile* profile,
+    RenderViewHost** rvh,
+    std::string* error) WARN_UNUSED_RESULT;
+
 #endif  // CHROME_BROWSER_AUTOMATION_AUTOMATION_PROVIDER_JSON_H_