Add DCHECKs to validate ProfileIOData's list of protocols.

chrome/browser/profiles/profile_io_data.h

Index: chrome/browser/profiles/profile_io_data.h
diff --git a/chrome/browser/profiles/profile_io_data.h b/chrome/browser/profiles/profile_io_data.h
index 33e601110bfa689928c91619d20e22d1bc33f7ba..dfd5c5be43e59635f3d67464d4b6f2cd88666257 100644
--- a/chrome/browser/profiles/profile_io_data.h
+++ b/chrome/browser/profiles/profile_io_data.h
@@ -110,13 +110,13 @@ class ProfileIOData {
 
   static ProfileIOData* FromResourceContext(content::ResourceContext* rc);
 
-  // Returns true if |scheme| is handled in Chrome, or by default handlers in
-  // net::URLRequest.
-  static bool IsHandledProtocol(const std::string& scheme);
+  // Returns true if |scheme| is handled by a protocol handler built into in
+  // Chrome, or by default handlers in net::URLRequest.
+  static bool IsBuiltInProtocol(const std::string& scheme);
 
   // Returns true if |url| is handled in Chrome, or by default handlers in
   // net::URLRequest.
-  static bool IsHandledURL(const GURL& url);
+  static bool HasBuiltInProtocol(const GURL& url);
 
   // Utility to install additional WebUI handlers into the |job_factory|.
   // Ownership of the handlers is transfered from |protocol_handlers|