Disable PDF tests on Mac.

chrome/test/plugin/pdf_browsertest.cc

 // Copyright (c) 2010 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 "app/clipboard/clipboard.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
@@ skipping 24 matching lines @@
         snapshot_different_(true),
         next_dummy_search_value_(0) {
   }
 
  protected:
   bool have_plugin() const { return have_plugin_; }
 
   virtual void SetUp() {
     FilePath pdf_path;
     PathService::Get(chrome::FILE_PDF_PLUGIN, &pdf_path);
+#if !defined(OS_MACOSX)
+    // http://crbug.com/61258: renderer always crashes on Mac.
     have_plugin_ = file_util::PathExists(pdf_path);
+#endif
     InProcessBrowserTest::SetUp();
   }
 
   void Load() {
     GURL url(ui_test_utils::GetTestUrl(
         FilePath(FilePath::kCurrentDirectory),
         FilePath(FILE_PATH_LITERAL("pdf_browsertest.pdf"))));
     ui_test_utils::NavigateToURL(browser(), url);
     gfx::Rect bounds(gfx::Rect(0, 0, kBrowserWidth, kBrowserHeight));
 
@@ skipping 178 matching lines @@
 
   browser()->GetSelectedTabContents()->render_view_host()->Copy();
   ASSERT_NO_FATAL_FAILURE(WaitForResponse());
 
   std::string text;
   clipboard.ReadAsciiText(Clipboard::BUFFER_STANDARD, &text);
   ASSERT_EQ("adipiscing", text);
 }
 
 }  // namespace