Move InstallObserver::OnBeginExtensionInstall parameters to a struct

chrome/browser/extensions/activity_log/activity_log.h

Index: chrome/browser/extensions/activity_log/activity_log.h
diff --git a/chrome/browser/extensions/activity_log/activity_log.h b/chrome/browser/extensions/activity_log/activity_log.h
index a17b8df274a61fe05feb74cd37f5d5a5c877a7ab..e5af374c0641c340d91a397d35d3fefe2d620249 100644
--- a/chrome/browser/extensions/activity_log/activity_log.h
+++ b/chrome/browser/extensions/activity_log/activity_log.h
@@ -90,11 +90,8 @@ class ActivityLog : public BrowserContextKeyedService,
   virtual void OnExtensionUnloaded(const Extension* extension) OVERRIDE;
   virtual void OnExtensionUninstalled(const Extension* extension) OVERRIDE;
   // We also have to list the following from InstallObserver.
-  virtual void OnBeginExtensionInstall(const std::string& extension_id,
-                                       const std::string& extension_name,
-                                       const gfx::ImageSkia& installing_icon,
-                                       bool is_app,
-                                       bool is_platform_app) OVERRIDE {}
+  virtual void OnBeginExtensionInstall(
+      const ExtensionInstallParams& params) OVERRIDE {}
   virtual void OnDownloadProgress(const std::string& extension_id,
                                   int percent_downloaded) OVERRIDE {}
   virtual void OnInstallFailure(const std::string& extension_id) OVERRIDE {}