Allow chrome.debugger API to attach to extension background pages.

chrome/browser/extensions/api/debugger/debugger_extension_apitest.cc

Index: chrome/browser/extensions/api/debugger/debugger_extension_apitest.cc
diff --git a/chrome/browser/extensions/api/terminal/terminal_private_apitest.cc b/chrome/browser/extensions/api/debugger/debugger_extension_apitest.cc
similarity index 54%
copy from chrome/browser/extensions/api/terminal/terminal_private_apitest.cc
copy to chrome/browser/extensions/api/debugger/debugger_extension_apitest.cc
index c8fe1e636e364f95f53314b1413a7978c28d155f..3d0b3aed7ed57e5f3d14c0d6884b7b8c27d07781 100644
--- a/chrome/browser/extensions/api/terminal/terminal_private_apitest.cc
+++ b/chrome/browser/extensions/api/debugger/debugger_extension_apitest.cc
@@ -6,15 +6,14 @@
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/common/chrome_switches.h"
 
-class ExtensionTerminalPrivateApiTest : public ExtensionApiTest {
+class ExtensionApiTestWithSwitch : public ExtensionApiTest {
+ public:
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
     ExtensionApiTest::SetUpCommandLine(command_line);
-    command_line->AppendSwitchASCII(
-        switches::kWhitelistedExtensionID, "kidcpjlbjdmcnmccjhjdckhbngnhnepk");
+    command_line->AppendSwitch(switches::kEnableSilentDebugging);
   }
 };
 
-IN_PROC_BROWSER_TEST_F(ExtensionTerminalPrivateApiTest, TerminalTest) {
-  EXPECT_TRUE(RunExtensionSubtest("terminal/component_extension", "test.html"))
-      << message_;
-};
+IN_PROC_BROWSER_TEST_F(ExtensionApiTestWithSwitch, ExtensionDebugger) {
+  ASSERT_TRUE(RunExtensionTest("debugger_extension")) << message_;
+}