Remove last extension dependencies from content.

content/browser/content_browser_client.cc

Index: content/browser/content_browser_client.cc
diff --git a/content/browser/content_browser_client.cc b/content/browser/content_browser_client.cc
index bc5965ffc18e8e9f95f6b645ca2abfa325937e56..0ca9077e97f2e25e9d6930c638bd64990e139a67 100644
--- a/content/browser/content_browser_client.cc
+++ b/content/browser/content_browser_client.cc
@@ -110,6 +110,20 @@ void ContentBrowserClient::AddNewCertificate(
     int render_view_id) {
 }
 
+bool ContentBrowserClient::CheckBackgroundPermission(
+    const GURL& source_url, const content::ResourceContext& context) {
+  return false;
+}
+
+std::string ContentBrowserClient::GetProcessHostTitle(
+    const GURL& url, const content::ResourceContext& context) {
+  return std::string();
+}
+
+bool ContentBrowserClient::ShouldForceDownloadResource(
+    const GURL& url, const std::string& mime_type) {
+  return false;
+}
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 int ContentBrowserClient::GetCrashSignalFD(const std::string& process_type) {
   return -1;