Move DownloadTestObserver and friends down into content.

chrome/browser/download/download_test_file_chooser_observer.h

Index: chrome/browser/download/download_test_file_chooser_observer.h
diff --git a/chrome/browser/download/download_test_file_chooser_observer.h b/chrome/browser/download/download_test_file_chooser_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..9380065e581a7824531af38102fb47a0b2ec80e0
--- /dev/null
+++ b/chrome/browser/download/download_test_file_chooser_observer.h
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_TEST_FILE_CHOOSER_OBSERVER_H_
+#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_TEST_FILE_CHOOSER_OBSERVER_H_
+
+#include "base/memory/ref_counted.h"
+
+class Profile;
+
+namespace internal {
+class MockFileChooserDownloadManagerDelegate;
+}
+
+// Observes and overrides file chooser activity for a profile. By default, once
+// attached to a profile, this class overrides the default file chooser by
+// replacing the ChromeDownloadManagerDelegate associated with |profile|.
+// NOTE: Again, this overrides the ChromeDownloadManagerDelegate for |profile|.

[benjhayden, 2012/08/13 16:35:18]

This looks like a mosquito shotgun solution. Shouldn't there be a more specific
mechanism?

[Randy Smith (Not in Mondays), 2012/08/13 18:57:49]

Quite possibly; I don't have a strong feeling about it.  This has the advantage
of not requiring any extra interfaces in production code other than the ones we
have, and the disadvantage (called out above) that if you override the CDMD this
way, you can't override it any other way.  Still, I agree that the mosquito
seems a little overpowered by this solution. 

But you're not going to make me rearchitect this test support class just to do a
chrome->content refactor, are you?  :-} :-|

+class DownloadTestFileChooserObserver {
+ public:
+  // Attaches to |profile|. By default file chooser dialogs will be disabled
+  // once attached. Call EnableFileChooser() to re-enable.
+  explicit DownloadTestFileChooserObserver(Profile* profile);
+  ~DownloadTestFileChooserObserver();
+
+  // Sets whether the file chooser dialog is enabled. If |enable| is false, any
+  // attempt to display a file chooser dialog will cause the download to be
+  // canceled. Otherwise, attempting to display a file chooser dialog will
+  // result in the download continuing with the suggested path.
+  void EnableFileChooser(bool enable);
+
+  // Returns true if a file chooser dialog was displayed since the last time
+  // this method was called.
+  bool TestAndResetDidShowFileChooser();
+
+ private:
+  scoped_refptr<internal::MockFileChooserDownloadManagerDelegate>
+      test_delegate_;
+};
+
+#endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_TEST_FILE_CHOOSER_OBSERVER_H_