Make the relationship between the find bar position and the top container height more obvious

chrome/browser/ui/views/find_bar_host.cc

 // 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.
 
 #include "chrome/browser/ui/views/find_bar_host.h"
 
 #include <algorithm>
 
 #include "chrome/browser/ui/find_bar/find_bar_controller.h"
 #include "chrome/browser/ui/find_bar/find_tab_helper.h"
@@ skipping 250 matching lines @@
   if (widget_bounds.IsEmpty())
     return gfx::Rect();
 
   // Ask the view how large an area it needs to draw on.
   gfx::Size prefsize = view()->GetPreferredSize();
 
   // Limit width to the available area.
   if (widget_bounds.width() < prefsize.width())
     prefsize.set_width(widget_bounds.width());
 
+  // Don't show the find bar if |widget_bounds| is not tall enough.
+  if (widget_bounds.height() < prefsize.height())
+    return gfx::Rect();
+
   // Place the view in the top right corner of the widget boundaries (top left
   // for RTL languages).
   gfx::Rect view_location;
   int x = widget_bounds.x();
   if (!base::i18n::IsRTL())
     x += widget_bounds.width() - prefsize.width();
   int y = widget_bounds.y();
   view_location.SetRect(x, y, prefsize.width(), prefsize.height());
 
   // When we get Find results back, we specify a selection rect, which we
@@ skipping 60 matching lines @@
   gfx::Rect frame_rect = host()->GetTopLevelWidget()->GetWindowBoundsInScreen();
   content::WebContentsView* tab_view =
       find_bar_controller_->web_contents()->GetView();
   gfx::Rect webcontents_rect = tab_view->GetViewBounds();
   avoid_overlapping_rect->Offset(0, webcontents_rect.y() - frame_rect.y());
 }
 
 FindBarView* FindBarHost::find_bar_view() {
   return static_cast<FindBarView*>(view());
 }