Move kExtensionScheme from content to chrome

content/common/url_constants.h

Index: content/common/url_constants.h
diff --git a/content/common/url_constants.h b/content/common/url_constants.h
index 801f1abd9e5c5d6e285344a09205a02cf7c6e7f8..f00460a20028171b202e254550d8a86bd952e4ac 100644
--- a/content/common/url_constants.h
+++ b/content/common/url_constants.h
@@ -12,8 +12,9 @@
 
 namespace chrome {
 
-// Null terminated list of schemes that are savable.
-extern const char* kSavableSchemes[];
+// Null terminated list of schemes that are savable. This function can be
+// invoked on any thread.
+const char** GetSavableSchemes();
 
 // Canonical schemes you can use as input to GURL.SchemeIs().
 // TODO(jam): some of these don't below in the content layer, but are accessed
@@ -25,7 +26,6 @@ CONTENT_EXPORT extern const char kChromeInternalScheme[];
 CONTENT_EXPORT extern const char kChromeUIScheme[];  // Used for WebUIs.
 CONTENT_EXPORT extern const char kCrosScheme[];      // Used for ChromeOS.
 CONTENT_EXPORT extern const char kDataScheme[];
-CONTENT_EXPORT extern const char kExtensionScheme[];
 CONTENT_EXPORT extern const char kFileScheme[];
 CONTENT_EXPORT extern const char kFileSystemScheme[];
 CONTENT_EXPORT extern const char kFtpScheme[];
@@ -46,6 +46,13 @@ CONTENT_EXPORT extern const char kAboutCrashURL[];
 // Special URL used to start a navigation to an error page.
 extern const char kUnreachableWebDataURL[];
 
+// Call near the beginning of startup to register the content layer's internal
+// URLs that should be parsed as "standard" with the googleurl library. The
+// embedder can pass a 0-terminated list of additional schemes that should be
+// savable, or NULL if the standard list is sufficient.
+void CONTENT_EXPORT RegisterContentSchemes(
+    const char** additional_savable_schemes);
+
 }  // namespace chrome
 
 #endif  // CONTENT_COMMON_URL_CONSTANTS_H_