Allow the content client to override browser Mojo services.

content/public/browser/content_browser_client.cc

Index: content/public/browser/content_browser_client.cc
diff --git a/content/public/browser/content_browser_client.cc b/content/public/browser/content_browser_client.cc
index ae99730965706d35b49b2c11f0af37252dde37af..1987dc62b54936e967130c904c6f979c42d52683 100644
--- a/content/public/browser/content_browser_client.cc
+++ b/content/public/browser/content_browser_client.cc
@@ -320,6 +320,13 @@ net::CookieStore* ContentBrowserClient::OverrideCookieStoreForRenderProcess(
   return NULL;
 }
 
+bool ContentBrowserClient::CheckMediaAccessPermission(
+    BrowserContext* browser_context,
+    const GURL& security_origin,
+    MediaStreamType type) {
+  return false;
+}
+
 #if defined(OS_WIN)
 const wchar_t* ContentBrowserClient::GetResourceDllName() {
   return NULL;
@@ -334,11 +341,4 @@ ContentBrowserClient::OverrideCreateExternalVideoSurfaceContainer(
 }
 #endif
 
-bool ContentBrowserClient::CheckMediaAccessPermission(
-    BrowserContext* browser_context,
-    const GURL& security_origin,
-    MediaStreamType type) {
-  return false;
-}
-
 }  // namespace content