Track the active ExtensionKeybindingRegistry and make it available to EventRewriter.

chrome/browser/extensions/extension_keybinding_apitest.cc

Index: chrome/browser/extensions/extension_keybinding_apitest.cc
diff --git a/chrome/browser/extensions/extension_keybinding_apitest.cc b/chrome/browser/extensions/extension_keybinding_apitest.cc
index 215a6103261e164649d695ca430a2ee39b1b591e..020e7266591ba2b630c8ba23dd8bf101441cd816 100644
--- a/chrome/browser/extensions/extension_keybinding_apitest.cc
+++ b/chrome/browser/extensions/extension_keybinding_apitest.cc
@@ -731,4 +731,30 @@ IN_PROC_BROWSER_TEST_F(CommandsApiTest, ContinuePropagation) {
   ASSERT_TRUE(catcher.GetNextResult());
 }
 
+// Test is only applicable on Chrome OS.
+#if defined(OS_CHROMEOS)
+IN_PROC_BROWSER_TEST_F(CommandsApiTest, ChromeOSConversions) {
+  // Setup the environment.
+  ASSERT_TRUE(test_server()->Start());
+  ASSERT_TRUE(ui_test_utils::BringBrowserWindowToFront(browser()));
+  ASSERT_TRUE(RunExtensionTest("keybinding/chromeos_conversions")) << message_;
+  ui_test_utils::NavigateToURL(
+      browser(), test_server()->GetURL("files/extensions/test_file.txt"));
+
+  ResultCatcher catcher;
+
+  // Send all expected keys.

[Finnur, 2014/09/12 11:25:44]

Please document what keys those are (Search+Shift+Left), etc.

[David Tseng, 2014/09/12 23:18:33]

That seems unnecessary since the keys are listed below? If you find it more
readable, I suppose, but seems pretty clear from the SendKeyPressSync calls.

[Finnur, 2014/09/15 10:48:42]

I do find it more readable. I can never remember what all those booleans mean
(well, I know they mean Command, Control, Alt, and Shift, but I always have to
look up the order to be sure).

[David Tseng, 2014/09/15 17:25:12]

Done.

+  ASSERT_TRUE(ui_test_utils::SendKeyPressSync(
+      browser(), ui::VKEY_LEFT, false, true, false, true));
+  ASSERT_TRUE(ui_test_utils::SendKeyPressSync(
+      browser(), ui::VKEY_UP, false, true, false, true));
+  ASSERT_TRUE(ui_test_utils::SendKeyPressSync(
+      browser(), ui::VKEY_RIGHT, false, true, false, true));
+  ASSERT_TRUE(ui_test_utils::SendKeyPressSync(
+      browser(), ui::VKEY_DOWN, false, true, false, true));
+
+  ASSERT_TRUE(catcher.GetNextResult());
+}
+#endif  // OS_CHROMEOS
+
 }  // namespace extensions