Parse the script_badge manifest section.

chrome/common/extensions/extension_switch_utils.cc

Index: chrome/common/extensions/extension_switch_utils.cc
diff --git a/chrome/common/extensions/extension_switch_utils.cc b/chrome/common/extensions/extension_switch_utils.cc
index 6f9d00cf33f40f80ec62abd95456e5bbaf1468fa..7a8dedf7afea2b29c3cafdff17921821237c8256 100644
--- a/chrome/common/extensions/extension_switch_utils.cc
+++ b/chrome/common/extensions/extension_switch_utils.cc
@@ -5,6 +5,7 @@
 #include "chrome/common/extensions/extension_switch_utils.h"
 
 #include "base/command_line.h"
+#include "base/logging.h"
 #include "chrome/common/chrome_switches.h"
 
 namespace extensions {
@@ -22,9 +23,40 @@ bool IsEasyOffStoreInstallEnabled() {
 #endif
 }
 
+enum SwitchState {
+  USE_COMMAND_LINE,
+  FORCE_ENABLE,
+  FORCE_DISABLE
+};
+static SwitchState action_box_switch_state = USE_COMMAND_LINE;
 bool IsActionBoxEnabled() {
-  return CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kEnableActionBox);
+  switch (action_box_switch_state) {
+    case USE_COMMAND_LINE:
+      return CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableActionBox);
+    case FORCE_ENABLE:
+      return true;
+    case FORCE_DISABLE:
+      return false;
+  }
+  NOTREACHED();
+  return false;
+}
+
+ScopedSetActionBoxForTest::ScopedSetActionBoxForTest(EnabledState state) {
+  CHECK(action_box_switch_state == USE_COMMAND_LINE)
+      << "Can't nest ScopedSetActionBoxForTest instances.";
+  switch (state) {
+    case ENABLED:
+      action_box_switch_state = FORCE_ENABLE;
+      break;
+    case DISABLED:
+      action_box_switch_state = FORCE_DISABLE;
+      break;
+  }
+}
+ScopedSetActionBoxForTest::~ScopedSetActionBoxForTest() {
+  action_box_switch_state = USE_COMMAND_LINE;
 }
 
 }  // switch_utils