Remove PluginLoadObserver and related logic, it was only used for NPAPI.

content/child/npapi/plugin_stream_url.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/child/npapi/plugin_stream_url.h"
 
 #include <algorithm>
 
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "content/child/npapi/plugin_host.h"
 #include "content/child/npapi/plugin_instance.h"
 #include "content/child/npapi/plugin_lib.h"
 #include "content/child/npapi/plugin_url_fetcher.h"
 #include "content/child/npapi/webplugin.h"
 #include "net/http/http_response_headers.h"
 
 namespace content {
 
 PluginStreamUrl::PluginStreamUrl(
     unsigned long resource_id,
     const GURL &url,
-    PluginInstance *instance,
-    bool notify_needed,
-    void *notify_data)
-    : PluginStream(instance, url.spec().c_str(), notify_needed, notify_data),
+    PluginInstance *instance)
+    : PluginStream(instance, url.spec().c_str()),
       url_(url),
       id_(resource_id) {
 }
 
 void PluginStreamUrl::SetPluginURLFetcher(PluginURLFetcher* fetcher) {
   plugin_url_fetcher_.reset(fetcher);
 }
 
 void PluginStreamUrl::URLRedirectResponse(bool allow) {
   if (plugin_url_fetcher_.get()) {
@@ skipping 46 matching lines @@
     for (size_t i = 0; i < range_requests_.size(); ++i)
       instance()->webplugin()->CancelResource(range_requests_[i]);
   }
 
   range_requests_.clear();
 
   STLDeleteElements(&range_request_fetchers_);
 }
 
 void PluginStreamUrl::WillSendRequest(const GURL& url, int http_status_code) {
-  if (notify_needed()) {
-    // If the plugin participates in HTTP url redirect handling then notify it.
-    if (net::HttpResponseHeaders::IsRedirectResponseCode(http_status_code) &&
-        instance()->handles_url_redirects()) {
-      pending_redirect_url_ = url.spec();
-      instance()->NPP_URLRedirectNotify(url.spec().c_str(), http_status_code,
-          notify_data());
-      return;
-    }
-  }
   url_ = url;
   UpdateUrl(url.spec().c_str());
 }
 
 void PluginStreamUrl::DidReceiveResponse(const std::string& mime_type,
                                          const std::string& headers,
                                          uint32 expected_length,
                                          uint32 last_modified,
                                          bool request_is_seekable) {
   // Protect the stream against it being destroyed or the whole plugin instance
@@ skipping 95 matching lines @@
 }
 
 void PluginStreamUrl::UpdateUrl(const char* url) {
   DCHECK(!open());
   free(const_cast<char*>(stream()->url));
   stream()->url = base::strdup(url);
   pending_redirect_url_.clear();
 }
 
 }  // namespace content