Make extension popups shrink when their contents shrink.

chrome/renderer/render_view.cc

 // Copyright (c) 2009 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.
 
 #if defined(ENABLE_PEPPER)
 #define PEPPER_APIS_ENABLED
 #endif
 
 #include "chrome/renderer/render_view.h"
 
@@ skipping 2528 matching lines @@
 
 void RenderView::didChangeContentsSize(WebFrame* frame, const WebSize& size) {
   // We don't always want to send the change messages over IPC, only if we've
   // be put in that mode by getting a |ViewMsg_EnablePreferredSizeChangedMode|
   // message.
   if (send_preferred_size_changes_) {
     // WebCore likes to tell us things have changed even when they haven't, so
     // cache the width and height and only send the IPC message when we're sure
     // they're different.
     int width = webview()->mainFrame()->contentsPreferredWidth();
+    int height = webview()->mainFrame()->documentElementScrollHeight();
+    
     if (width != preferred_size_.width() ||
-        size.height != preferred_size_.height()) {
+        height != preferred_size_.height()) {
       preferred_size_.set_width(width);
+      preferred_size_.set_height(height);
 
-      // TODO(erikkay) the contents size is not really the same as the
-      // preferred size.  It's just the current size.  This means that for
-      // height, it will only ever grow, it will never shrink.
-      preferred_size_.set_height(size.height);
       Send(new ViewHostMsg_DidContentsPreferredSizeChange(routing_id_,
                                                           preferred_size_));
     }
   }
 }
 
 void RenderView::didChangeScrollOffset(WebFrame* frame) {
   StartNavStateSyncTimerIfNecessary();
 }
 
@@ skipping 1272 matching lines @@
       new PluginMsg_SignalModalDialogEvent(host_window_));
 
   message->EnableMessagePumping();  // Runs a nested message loop.
   bool rv = Send(message);
 
   PluginChannelHost::Broadcast(
       new PluginMsg_ResetModalDialogEvent(host_window_));
 
   return rv;
 }