Attempt 2 to enable async data: URL loading.

content/renderer/browser_plugin/browser_plugin_browsertest.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 "content/renderer/browser_plugin/browser_plugin_browsertest.h"
 
 #include "base/debug/leak_annotations.h"
 #include "base/files/file_path.h"
 #include "base/memory/singleton.h"
 #include "base/path_service.h"
@@ skipping 149 matching lines @@
   return true;
 }
 
 MockBrowserPlugin* BrowserPluginTest::GetCurrentPlugin() {
   BrowserPluginHostMsg_Attach_Params params;
   return GetCurrentPluginWithAttachParams(&params);
 }
 
 MockBrowserPlugin* BrowserPluginTest::GetCurrentPluginWithAttachParams(
     BrowserPluginHostMsg_Attach_Params* params) {
+  // Make sure the BrowserPluginHostMsg_Attach IPC message is handled before
+  // proceeding any further.
+  ProcessPendingMessages();
+
   int instance_id = 0;
   const IPC::Message* msg =
       browser_plugin_manager()->sink().GetUniqueMessageMatching(
           BrowserPluginHostMsg_Attach::ID);
   if (!msg)
     return NULL;
 
   PickleIterator iter(*msg);
   if (!iter.ReadInt(&instance_id))
     return NULL;
@@ skipping 407 matching lines @@
     // These value are not populated (as an optimization) if autosize is
     // disabled.
     EXPECT_EQ(0, auto_size_params.min_size.width());
     EXPECT_EQ(0, auto_size_params.min_size.height());
     EXPECT_EQ(0, auto_size_params.max_size.width());
     EXPECT_EQ(0, auto_size_params.max_size.height());
   }
 }
 
 }  // namespace content