Moved the TraceUploader to chrome/ and abstracted it for alternative new upload destinations.

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 f9177ed786bbadf9190431d6c8e4bacb13ce2ff0..67d2df7c1bf839247279e9a134aa3e7a52900f22 100644
--- a/content/public/browser/content_browser_client.cc
+++ b/content/public/browser/content_browser_client.cc
@@ -312,6 +312,10 @@ DevToolsManagerDelegate* ContentBrowserClient::GetDevToolsManagerDelegate() {
   return nullptr;
 }
 
+TracingDelegate* ContentBrowserClient::GetTracingDelegate() {
+  return nullptr;
+}
+
 bool ContentBrowserClient::IsPluginAllowedToCallRequestOSFileHandle(
     BrowserContext* browser_context,
     const GURL& url) {