Cleanup: Move kChromeUIScheme constant into content namespace.

chrome/common/extensions/chrome_extensions_client.cc

Index: chrome/common/extensions/chrome_extensions_client.cc
diff --git a/chrome/common/extensions/chrome_extensions_client.cc b/chrome/common/extensions/chrome_extensions_client.cc
index 913b0cd41d7b214ad6262a0505181b81dfdb027a..b76812260e7e9468dac6a029c47b557a59636515 100644
--- a/chrome/common/extensions/chrome_extensions_client.cc
+++ b/chrome/common/extensions/chrome_extensions_client.cc
@@ -85,7 +85,7 @@ void ChromeExtensionsClient::FilterHostPermissions(
   for (URLPatternSet::const_iterator i = hosts.begin();
        i != hosts.end(); ++i) {
     // Filters out every URL pattern that matches chrome:// scheme.
-    if (i->scheme() == chrome::kChromeUIScheme) {
+    if (i->scheme() == content::kChromeUIScheme) {
       // chrome://favicon is the only URL for chrome:// scheme that we
       // want to support. We want to deprecate the "chrome" scheme.
       // We should not add any additional "host" here.