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..3616ddb06820ea386af696f0fff40e18052639cb 100644
--- a/chrome/test/base/test_launcher_utils.cc
+++ b/chrome/test/base/test_launcher_utils.cc
@@ -72,6 +72,21 @@ void PrepareBrowserCommandLineForTests(base::CommandLine* command_line) {
   command_line->AppendSwitch(switches::kDisableComponentUpdate);
 }
 
+void RemoveCommandLineSwitch(const base::CommandLine& in_command_line,
+                             const std::string& switch_to_remove,
+                             base::CommandLine* out_command_line) {
+  const base::CommandLine::SwitchMap& switch_map =
+      in_command_line.GetSwitches();
+  for (base::CommandLine::SwitchMap::const_iterator i = switch_map.begin();
+       i != switch_map.end(); ++i) {
+    const std::string& switch_name = i->first;
+    if (switch_name == switch_to_remove)
+      continue;
+
+    out_command_line->AppendSwitchNative(switch_name, i->second);
+  }
+}
+
 bool OverrideUserDataDir(const base::FilePath& user_data_dir) {
   bool success = true;