Refactor extension event distribution to use Values instead of JSON strings.

chrome/browser/extensions/extension_event_router_forwarder.cc

Index: chrome/browser/extensions/extension_event_router_forwarder.cc
diff --git a/chrome/browser/extensions/extension_event_router_forwarder.cc b/chrome/browser/extensions/extension_event_router_forwarder.cc
index 523132451b66d6bf2bd9ef554bcdb35fbf41ad08..b82585db76dd5f0eaa1f516c8c21eefdb5956ea3 100644
--- a/chrome/browser/extensions/extension_event_router_forwarder.cc
+++ b/chrome/browser/extensions/extension_event_router_forwarder.cc
@@ -5,6 +5,7 @@
 #include "chrome/browser/extensions/extension_event_router_forwarder.h"
 
 #include "base/bind.h"
+#include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/extension_event_router.h"
 #include "chrome/browser/profiles/profile_manager.h"
@@ -20,14 +21,14 @@ ExtensionEventRouterForwarder::~ExtensionEventRouterForwarder() {
 
 void ExtensionEventRouterForwarder::BroadcastEventToRenderers(
     const std::string& event_name,
-    const std::string& event_args,
+    base::ListValue* event_args,
     const GURL& event_url) {
   HandleEvent("", event_name, event_args, 0, true, event_url);
 }
 
 void ExtensionEventRouterForwarder::DispatchEventToRenderers(
     const std::string& event_name,
-    const std::string& event_args,
+    base::ListValue* event_args,
     void* profile,
     bool use_profile_to_restrict_events,
     const GURL& event_url) {
@@ -40,7 +41,7 @@ void ExtensionEventRouterForwarder::DispatchEventToRenderers(
 void ExtensionEventRouterForwarder::BroadcastEventToExtension(
     const std::string& extension_id,
     const std::string& event_name,
-    const std::string& event_args,
+    base::ListValue* event_args,
     const GURL& event_url) {
   HandleEvent(extension_id, event_name, event_args, 0, true, event_url);
 }
@@ -48,7 +49,7 @@ void ExtensionEventRouterForwarder::BroadcastEventToExtension(
 void ExtensionEventRouterForwarder::DispatchEventToExtension(
     const std::string& extension_id,
     const std::string& event_name,
-    const std::string& event_args,
+    base::ListValue* event_args,
     void* profile,
     bool use_profile_to_restrict_events,
     const GURL& event_url) {
@@ -61,7 +62,7 @@ void ExtensionEventRouterForwarder::DispatchEventToExtension(
 void ExtensionEventRouterForwarder::HandleEvent(
     const std::string& extension_id,
     const std::string& event_name,
-    const std::string& event_args,
+    base::ListValue* event_args,
     void* profile_ptr,
     bool use_profile_to_restrict_events,
     const GURL& event_url) {
@@ -102,7 +103,7 @@ void ExtensionEventRouterForwarder::CallExtensionEventRouter(
     Profile* profile,
     const std::string& extension_id,
     const std::string& event_name,
-    const std::string& event_args,
+    base::ListValue* event_args,
     Profile* restrict_to_profile,
     const GURL& event_url) {
   // We may not have an extension in cases like chromeos login