Stretching NativeViewHost, and misc tab capture fixes.

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
@@ skipping 230 matching lines @@
                             &decorationFrames, &textFrame);
 
   // Find our decoration and return the corresponding frame.
   std::vector<LocationBarDecoration*>::const_iterator iter =
       std::find(decorations.begin(), decorations.end(), aDecoration);
   if (iter != decorations.end()) {
     const size_t index = iter - decorations.begin();
     return decorationFrames[index];
   }
 
-  // Decorations which are not visible should have been filtered out
-  // at the top, but return |NSZeroRect| rather than a 0-width rect
-  // for consistency.
-  NOTREACHED();
+  // Decorations which are not visible usually have been filtered out at the
+  // top. However, in some cases they are not (e.g., new tabs that have never
+  // been foregrounded). As a default, return |NSZeroRect| rather than a 0-width
+  // rect for consistency.
   return NSZeroRect;
 }
 
 - (NSRect)backgroundFrameForDecoration:(LocationBarDecoration*)decoration
                                inFrame:(NSRect)cellFrame
                       isLeftDecoration:(BOOL*)isLeftDecoration {
   NSRect decorationFrame =
       [self frameForDecoration:decoration inFrame:cellFrame];
   std::vector<LocationBarDecoration*>& left_decorations =
       cocoa_l10n_util::ShouldDoExperimentalRTLLayout() ? trailingDecorations_
@@ skipping 463 matching lines @@
 
 @end
 
 @implementation AutocompleteTextFieldCell (TestingAPI)
 
 - (const std::vector<LocationBarDecoration*>&)mouseTrackingDecorations {
   return mouseTrackingDecorations_;
 }
 
 @end