Update hotword private tests to not need auto whitelisting.

chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc

Index: chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc
diff --git a/chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc b/chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc
index 03f2251d9fcc16f490d9ff7873db499d784fc798..b77f09d492d673dd51a97bdede87c1509e88aa07 100644
--- a/chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc
+++ b/chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc
@@ -14,9 +14,12 @@
 #include "chrome/browser/search/hotword_service_factory.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
+#include "extensions/common/switches.h"
 
 namespace {
 
+const char kHotwordTestExtensionId[] = "cpfhkdbjfdgdebcjlifoldbijinjfifp";
+
 class MockHotwordService : public HotwordService {
  public:
   explicit MockHotwordService(Profile* profile)
@@ -77,6 +80,15 @@ class HotwordPrivateApiTest : public ExtensionApiTest {
   HotwordPrivateApiTest() {}
   virtual ~HotwordPrivateApiTest() {}
 
+  virtual void SetUpCommandLine(base::CommandLine* command_line) OVERRIDE {
+    ExtensionApiTest::SetUpCommandLine(command_line);
+
+    // Whitelist the test extensions (which all share a common ID) to use
+    // private APIs.
+    command_line->AppendSwitchASCII(
+        extensions::switches::kWhitelistedExtensionID, kHotwordTestExtensionId);
+  }
+
   virtual void SetUpOnMainThread() OVERRIDE {
     ExtensionApiTest::SetUpOnMainThread();