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

chrome/browser/extensions/extension_processes_api.h

Index: chrome/browser/extensions/extension_processes_api.h
diff --git a/chrome/browser/extensions/extension_processes_api.h b/chrome/browser/extensions/extension_processes_api.h
index 4e326963d73f3f161fac5ac98bbc1be014c47a2b..966cfa2c28fa2022d214d31521e4c497454b978b 100644
--- a/chrome/browser/extensions/extension_processes_api.h
+++ b/chrome/browser/extensions/extension_processes_api.h
@@ -15,6 +15,10 @@
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_widget_host.h"
 
+namespace base {
+class ListValue;
+}
+
 // Observes the Task Manager and routes the notifications as events to the
 // extension system.
 class ExtensionProcessesEventRouter : public TaskManagerModelObserver,
@@ -64,11 +68,11 @@ class ExtensionProcessesEventRouter : public TaskManagerModelObserver,
       content::RenderProcessHost* rph,
       content::RenderProcessHost::RendererClosedDetails* details);
 
-  void NotifyProfiles(const char* event_name, std::string json_args);
+  void NotifyProfiles(const char* event_name, base::ListValue* event_args);
 
   void DispatchEvent(Profile* profile,
                      const char* event_name,
-                     const std::string& json_args);
+                     base::ListValue* event_args);
 
   // Determines whether there is a registered listener for the specified event.
   // It helps to avoid collecing data if no one is interested in it.