Made notification center notifications collapsed and expandable.

ui/message_center/message_center_bubble.h

Index: ui/message_center/message_center_bubble.h
diff --git a/ui/message_center/message_center_bubble.h b/ui/message_center/message_center_bubble.h
index ba7adfad4493d3c9566f008e7a123a409431b3d2..04c886468965aae81f7e29c6a324a449eeb5cb41 100644
--- a/ui/message_center/message_center_bubble.h
+++ b/ui/message_center/message_center_bubble.h
@@ -11,7 +11,7 @@
 
 namespace message_center {
 
-class MessageCenterContentsView;
+class MessageCenterView;

[dharcourt, 2013/02/23 04:32:00]

I renamed "MessageCenterContentsView" to "MessageCenterView" and
"ScrollContentView" to "MessagesView" so their names reflect what they are
rather than how they're used (for example MessagesView displays a list of
messages whether it's used in a scroll view or not, so its name doesn't need to
include "ScrollContent").

This increases encapsulation and should simplify things for people reading this
code for the first time (for example they can read the MessagesView code without
having that class' name make them look for its scroll-related code).

MessageCenterView is still not as encapsulated as I'd like and it remains
coupled to MessageCenterBubble, but if we replace that with delegation we could
move MessageCenterView and MessagesView to a separate message_center_view.{h,cc}
and have that be message center UI code that's totally independent of where it's
used.

 
 // Bubble for message center.
 class MESSAGE_CENTER_EXPORT MessageCenterBubble : public MessageBubbleBase {
@@ -32,7 +32,7 @@ class MESSAGE_CENTER_EXPORT MessageCenterBubble : public MessageBubbleBase {
   size_t NumMessageViewsForTest() const;
 
  private:
-  MessageCenterContentsView* contents_view_;
+  MessageCenterView* contents_view_;
 
   // The maximum height
   int max_height_;