Get the path of the plugin interposing library from the embedder, since they're the ones who bundle…

content/browser/plugin_process_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 "content/browser/plugin_process_host.h"
 
 #if defined(OS_WIN) && !defined(USE_AURA)
 #include <windows.h>
 #elif defined(OS_POSIX)
 #include <utility>  // for pair<>
@@ skipping 243 matching lines @@
     // Pass on the locale so the null plugin will use the right language in the
     // prompt to install the desired plugin.
     cmd_line->AppendSwitchASCII(switches::kLang, locale);
   }
 
   cmd_line->AppendSwitchASCII(switches::kProcessChannelID, channel_id);
 
 #if defined(OS_POSIX)
   base::EnvironmentVector env;
 #if defined(OS_MACOSX) && !defined(__LP64__)
-  // Add our interposing library for Carbon. This is stripped back out in
-  // plugin_main.cc, so changes here should be reflected there.
-  std::string interpose_list(plugin_interpose_strings::kInterposeLibraryPath);
-  const char* existing_list =
-      getenv(plugin_interpose_strings::kDYLDInsertLibrariesKey);
-  if (existing_list) {
-    interpose_list.insert(0, ":");
-    interpose_list.insert(0, existing_list);
+  std::string interpose_list =
+      content::GetContentClient()->GetCarbonInterposePath();
+  if (!interpose_list.empty()) {
+    // Add our interposing library for Carbon. This is stripped back out in
+    // plugin_main.cc, so changes here should be reflected there.
+    const char* existing_list =
+        getenv(plugin_interpose_strings::kDYLDInsertLibrariesKey);
+    if (existing_list) {
+      interpose_list.insert(0, ":");
+      interpose_list.insert(0, existing_list);
+    }
   }
   env.push_back(std::pair<std::string, std::string>(
       plugin_interpose_strings::kDYLDInsertLibrariesKey,
       interpose_list));
 #endif
 #endif
 
   process_->Launch(
 #if defined(OS_WIN)
       FilePath(),
@@ skipping 162 matching lines @@
 }
 
 void PluginProcessHost::OnChannelCreated(
     const IPC::ChannelHandle& channel_handle) {
   Client* client = sent_requests_.front();
 
   if (client)
     client->OnChannelOpened(channel_handle);
   sent_requests_.pop_front();
 }