Implement learn more bubble on views.

chrome/browser/ui/views/autofill/learn_more_icon.h

Index: chrome/browser/ui/views/autofill/learn_more_icon.h
diff --git a/chrome/browser/ui/views/autofill/learn_more_icon.h b/chrome/browser/ui/views/autofill/learn_more_icon.h
new file mode 100644
index 0000000000000000000000000000000000000000..54833b9ae1e26dd520de680a56d1935f0d8acf2a
--- /dev/null
+++ b/chrome/browser/ui/views/autofill/learn_more_icon.h
@@ -0,0 +1,60 @@
+// Copyright 2013 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_UI_VIEWS_AUTOFILL_LEARN_MORE_ICON_H_
+#define CHROME_BROWSER_UI_VIEWS_AUTOFILL_LEARN_MORE_ICON_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/weak_ptr.h"
+#include "base/strings/string16.h"
+#include "ui/views/controls/image_view.h"
+
+namespace autofill {
+
+class LearnMoreIcon;
+
+// A delegate to notify when events happen.

[Evan Stade, 2013/11/05 02:01:40]

I'd much prefer if the bubble were managed by the icon. Removes the need for the
delegate interface, improves encapsulation, reduces amount of special code in
AutofillDialogViews. I think you should still be able to figure out how to make
the bubble float where you want it to. (You'll need to pull
ErrorBubble/InfoBubble into its own file)

[Dan Beam, 2013/11/05 07:00:55]

Done.

+class LearnMoreIconDelegate {
+ public:
+  // Called when the mouse enters |source|.
+  virtual void OnLearnMoreIconMouseEntered(LearnMoreIcon* source) = 0;
+
+  // Called when the moust exits |source|.
+  virtual void OnLearnMoreIconMouseExited(LearnMoreIcon* source) = 0;
+};
+
+// A learn more icon (just an ImageView with some text to be shown in a bubble).
+// Looks like (?).
+class LearnMoreIcon : public views::ImageView {

[Evan Stade, 2013/11/05 02:01:40]

leave the class name as TooltipIcon, or if you hate the name tooltip then maybe
FurtherInfoIcon or some similar mouthful.

[Dan Beam, 2013/11/05 07:00:55]

left as is

+ public:
+  explicit LearnMoreIcon(const base::string16& learn_more_text,
+                         const base::WeakPtr<LearnMoreIconDelegate>& delegate);
+  virtual ~LearnMoreIcon();
+
+  static const char kViewClassName[];
+
+  // views::ImageView:
+  virtual const char* GetClassName() const OVERRIDE;
+  virtual void OnMouseEntered(const ui::MouseEvent& event) OVERRIDE;
+  virtual void OnMouseExited(const ui::MouseEvent& event) OVERRIDE;
+
+  const base::string16& learn_more_text() { return learn_more_text_; }
+
+ private:
+  // Changes the actively showing image to the resource identified by |idr|.
+  void ChangeImageTo(int idr);
+
+  // Text to be shown in an informational bubble when this icon is hovered.
+  base::string16 learn_more_text_;
+
+  // Weak, un-owned, and must outlive this class.
+  base::WeakPtr<LearnMoreIconDelegate> delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(LearnMoreIcon);
+};
+
+}  // namespace autofill
+
+#endif  // CHROME_BROWSER_UI_VIEWS_AUTOFILL_LEARN_MORE_ICON_H_