Move InstallObserver::OnBeginExtensionInstall parameters to a struct

chrome/browser/extensions/install_tracker.cc

Index: chrome/browser/extensions/install_tracker.cc
diff --git a/chrome/browser/extensions/install_tracker.cc b/chrome/browser/extensions/install_tracker.cc
index c916d4cdb83f72984f29c5f4c4fb674327272dc2..7f70cac84fe6deb2e6804459d17c448d8a0e9e1e 100644
--- a/chrome/browser/extensions/install_tracker.cc
+++ b/chrome/browser/extensions/install_tracker.cc
@@ -47,17 +47,9 @@ void InstallTracker::RemoveObserver(InstallObserver* observer) {
 }
 
 void InstallTracker::OnBeginExtensionInstall(
-    const std::string& extension_id,
-    const std::string& extension_name,
-    const gfx::ImageSkia& installing_icon,
-    bool is_app,
-    bool is_platform_app) {
+    const InstallObserver::ExtensionInstallParams& params) {
   FOR_EACH_OBSERVER(InstallObserver, observers_,
-                    OnBeginExtensionInstall(extension_id,
-                                            extension_name,
-                                            installing_icon,
-                                            is_app,
-                                            is_platform_app));
+                    OnBeginExtensionInstall(params));
 }
 
 void InstallTracker::OnDownloadProgress(const std::string& extension_id,