media: Use bundled Widevine CDM in encrypted media browser tests

chrome/test/base/test_launcher_utils.cc

Index: chrome/test/base/test_launcher_utils.cc
diff --git a/chrome/test/base/test_launcher_utils.cc b/chrome/test/base/test_launcher_utils.cc
index 61fb15dd81fbd0930a2f36c8273af1a80a06060f..0d3543423c7931734a741195dd5beaa4d49db813 100644
--- a/chrome/test/base/test_launcher_utils.cc
+++ b/chrome/test/base/test_launcher_utils.cc
@@ -23,7 +23,8 @@
 
 namespace test_launcher_utils {
 
-void PrepareBrowserCommandLineForTests(base::CommandLine* command_line) {
+void PrepareBrowserCommandLineForTests(base::CommandLine* command_line,
+                                       bool enable_component_update) {
   // Turn off preconnects because they break the brittle python webserver;
   // see http://crbug.com/60035.
   command_line->AppendSwitch(switches::kDisablePreconnect);
@@ -69,7 +70,8 @@ void PrepareBrowserCommandLineForTests(base::CommandLine* command_line) {
   command_line->AppendSwitch(os_crypt::switches::kUseMockKeychain);
 #endif
 
-  command_line->AppendSwitch(switches::kDisableComponentUpdate);
+  if (!enable_component_update)
+    command_line->AppendSwitch(switches::kDisableComponentUpdate);
 }
 
 bool OverrideUserDataDir(const base::FilePath& user_data_dir) {