A few minor changes to the chrome.downloads extension API

chrome/browser/download/download_danger_prompt_browsertest.cc

Index: chrome/browser/download/download_danger_prompt_browsertest.cc
diff --git a/chrome/browser/download/download_danger_prompt_browsertest.cc b/chrome/browser/download/download_danger_prompt_browsertest.cc
index 5a7c9e8b9b5e45a5c4903c5b262421d062f3b71f..a32133ff7fb6791ac93092378fb55892661120d2 100644
--- a/chrome/browser/download/download_danger_prompt_browsertest.cc
+++ b/chrome/browser/download/download_danger_prompt_browsertest.cc
@@ -89,7 +89,8 @@ class DownloadDangerPromptTest : public InProcessBrowserTest {
         base::Bind(&DownloadDangerPromptTest::PromptCallback, this,
                    DownloadDangerPrompt::ACCEPT),
         base::Bind(&DownloadDangerPromptTest::PromptCallback, this,
-                   DownloadDangerPrompt::CANCEL));
+                   DownloadDangerPrompt::CANCEL),
+        base::Bind(&DownloadDangerPromptTest::PromptDestroyed, this));
     content::RunAllPendingInMessageLoop();
   }
 
@@ -97,6 +98,9 @@ class DownloadDangerPromptTest : public InProcessBrowserTest {
     EXPECT_FALSE(did_receive_callback_);
     EXPECT_EQ(expected_action_, action);
     did_receive_callback_ = true;
+  }
+
+  void PromptDestroyed() {
     prompt_ = NULL;
   }