Move kExtensionProcess to src/extensions/common/switches.cc

extensions/common/switches.cc

Index: extensions/common/switches.cc
diff --git a/extensions/common/switches.cc b/extensions/common/switches.cc
index 2c6a39be27d744573dc4e1fed1197a907eeca230..32f364590d175531a6393184d7022359f1527161 100644
--- a/extensions/common/switches.cc
+++ b/extensions/common/switches.cc
@@ -9,7 +9,7 @@ namespace extensions {
 namespace switches {
 
 // Allows non-https URL for background_page for hosted apps.
-const char kAllowHTTPBackgroundPage[]       = "allow-http-background-page";
+const char kAllowHTTPBackgroundPage[] = "allow-http-background-page";
 
 // Allows the browser to load extensions that lack a modern manifest when that
 // would otherwise be forbidden.
@@ -39,11 +39,14 @@ const char kErrorConsole[] = "error-console";
 
 // The time in milliseconds that an extension event page can be idle before it
 // is shut down.
-const char kEventPageIdleTime[]             = "event-page-idle-time";
+const char kEventPageIdleTime[] = "event-page-idle-time";
 
 // The time in milliseconds that an extension event page has between being
 // notified of its impending unload and that unload happening.
-const char kEventPageSuspendingTime[]       = "event-page-unloading-time";
+const char kEventPageSuspendingTime[] = "event-page-unloading-time";
+
+// Marks a renderer as extension process.
+const char kExtensionProcess[] = "extension-process";
 
 // Enables extensions running scripts on chrome:// URLs.
 // Extensions still need to explicitly request access to chrome:// URLs in the