Make the TestServer use an absolute document root path.

chrome/browser/net/proxy_browsertest.cc

Index: chrome/browser/net/proxy_browsertest.cc
diff --git a/chrome/browser/net/proxy_browsertest.cc b/chrome/browser/net/proxy_browsertest.cc
index 791c16baec1311e84c54758c39fb5476956025df..13ec47115ea5a92b0f68b8272946d66b621739d3 100644
--- a/chrome/browser/net/proxy_browsertest.cc
+++ b/chrome/browser/net/proxy_browsertest.cc
@@ -60,7 +60,7 @@ class ProxyBrowserTest : public InProcessBrowserTest {
   ProxyBrowserTest()
       : proxy_server_(net::TestServer::TYPE_BASIC_AUTH_PROXY,
                       net::TestServer::kLocalhost,
-                      base::FilePath()) {
+                      net::TestServer::GetSourcePath()) {
   }
 
   virtual void SetUp() OVERRIDE {
@@ -93,7 +93,8 @@ IN_PROC_BROWSER_TEST_F(ProxyBrowserTest, MAYBE_BasicAuthWSConnect) {
   // Launch WebSocket server.
   net::TestServer ws_server(net::TestServer::TYPE_WS,
                             net::TestServer::kLocalhost,
-                            net::GetWebSocketTestDataDirectory());
+                            net::TestServer::GetSourceRelativePath(
+                                net::GetWebSocketTestDataDirectory()));
   ASSERT_TRUE(ws_server.Start());
 
   content::WebContents* tab =