Changing PluginPrefs to use PluginFinder's async interface.

chrome/browser/chrome_plugin_browsertest.cc

Index: chrome/browser/chrome_plugin_browsertest.cc
diff --git a/chrome/browser/chrome_plugin_browsertest.cc b/chrome/browser/chrome_plugin_browsertest.cc
index a26d3eb37b23bb08aaec5a090df06c52d01e62e0..7763da7c54160e25fa09a55c99337d67bccaf0a8 100644
--- a/chrome/browser/chrome_plugin_browsertest.cc
+++ b/chrome/browser/chrome_plugin_browsertest.cc
@@ -84,7 +84,8 @@ class ChromePluginTest : public InProcessBrowserTest {
     PluginPrefs* plugin_prefs = PluginPrefs::GetForProfile(profile);
     scoped_refptr<content::MessageLoopRunner> runner =
         new content::MessageLoopRunner;
-    plugin_prefs->EnablePlugin(enable, flash_path, runner->QuitClosure());
+    plugin_prefs->EnablePlugin(enable, flash_path,
+                               base::Bind(&AssertPluginEnabled, runner));
     runner->Run();
   }
 
@@ -132,6 +133,13 @@ class ChromePluginTest : public InProcessBrowserTest {
     }
     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, quit_task);
   }
+
+  static void AssertPluginEnabled(
+      scoped_refptr<content::MessageLoopRunner> runner,
+      bool did_enable) {
+    ASSERT_TRUE(did_enable);
+    runner->Quit();
+  }
 };
 
 // Tests a bunch of basic scenarios with Flash.