content: Move more constants into content namespace.

content/public/common/url_constants.h

Index: content/public/common/url_constants.h
diff --git a/content/public/common/url_constants.h b/content/public/common/url_constants.h
index c470452d31aa2987acb9276d6d468545a12c7941..515a45f7b751d16d6dac4da4eb1a118332f62121 100644
--- a/content/public/common/url_constants.h
+++ b/content/public/common/url_constants.h
@@ -27,7 +27,6 @@ CONTENT_EXPORT extern const char kFileScheme[];
 CONTENT_EXPORT extern const char kFileSystemScheme[];
 CONTENT_EXPORT extern const char kFtpScheme[];
 CONTENT_EXPORT extern const char kGuestScheme[];
-CONTENT_EXPORT extern const char kChromeUIGpuHost[];
 CONTENT_EXPORT extern const char kHttpScheme[];
 CONTENT_EXPORT extern const char kHttpsScheme[];
 CONTENT_EXPORT extern const char kJavaScriptScheme[];
@@ -39,10 +38,16 @@ CONTENT_EXPORT extern const char kViewSourceScheme[];
 // Hosts for about URLs.
 CONTENT_EXPORT extern const char kAboutBlankURL[];
 CONTENT_EXPORT extern const char kAboutSrcDocURL[];
+
+}  // namespace chrome
+
+namespace content {
+
 CONTENT_EXPORT extern const char kChromeUIAccessibilityHost[];
 CONTENT_EXPORT extern const char kChromeUIAppCacheInternalsHost[];
 CONTENT_EXPORT extern const char kChromeUIBlobInternalsHost[];
 CONTENT_EXPORT extern const char kChromeUIBrowserCrashHost[];
+CONTENT_EXPORT extern const char kChromeUIGpuHost[];
 CONTENT_EXPORT extern const char kChromeUIHistogramHost[];
 CONTENT_EXPORT extern const char kChromeUIIndexedDBInternalsHost[];
 CONTENT_EXPORT extern const char kChromeUIMediaInternalsHost[];
@@ -52,10 +57,6 @@ CONTENT_EXPORT extern const char kChromeUITcmallocHost[];
 CONTENT_EXPORT extern const char kChromeUITracingHost[];
 CONTENT_EXPORT extern const char kChromeUIWebRTCInternalsHost[];
 
-}  // namespace chrome
-
-namespace content {
-
 // Full about URLs (including schemes).
 CONTENT_EXPORT extern const char kChromeUICrashURL[];
 CONTENT_EXPORT extern const char kChromeUIGpuCleanURL[];