Remove dependencies on extensions from content/browser/debugger.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 1c3c4ad16da217ed26bb37f47d57a917e22f656f..d8844d174ac2180036955cc66d65364c5482d7a9 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -476,6 +476,7 @@
         'browser/browser_focus_uitest.cc',
         'browser/browser_keyevents_browsertest.cc',
         'browser/collected_cookies_uitest.cc',
+        'browser/debugger/devtools_extension_debug_unittest.cc',
         'browser/instant/instant_browsertest.cc',
         'browser/notifications/notifications_interactive_uitest.cc',
         'browser/ui/gtk/bookmarks/bookmark_bar_gtk_interactive_uitest.cc',
@@ -495,6 +496,7 @@
         'test/out_of_proc_test_runner.cc',
         'test/unit/chrome_test_suite.h',
         '../content/browser/debugger/devtools_sanity_unittest.cc',
+        '../content/browser/debugger/devtools_sanity_unittest.h',
       ],
       'conditions': [
         ['toolkit_uses_gtk == 1', {