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

content/child/npapi/plugin_stream.h

Index: content/child/npapi/plugin_stream.h
diff --git a/content/child/npapi/plugin_stream.h b/content/child/npapi/plugin_stream.h
deleted file mode 100644
index 644e16c681b3bcec40bca00a97a40309cfdf12da..0000000000000000000000000000000000000000
--- a/content/child/npapi/plugin_stream.h
+++ /dev/null
@@ -1,148 +0,0 @@
-// 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.
-
-#ifndef CONTENT_CHILD_NPAPI_PLUGIN_STREAM_H_
-#define CONTENT_CHILD_NPAPI_PLUGIN_STREAM_H_
-
-#include <string>
-#include <vector>
-
-#include "base/files/file_path.h"
-#include "base/memory/ref_counted.h"
-#include "build/build_config.h"
-#include "third_party/npapi/bindings/npapi.h"
-
-namespace content {
-
-class PluginInstance;
-class WebPluginResourceClient;
-
-// Base class for a NPAPI stream.  Tracks basic elements
-// of a stream for NPAPI notifications and stream position.
-class PluginStream : public base::RefCounted<PluginStream> {
- public:
-  // Create a new PluginStream object.  If needNotify is true, then the
-  // plugin will be notified when the stream has been fully sent.
-  PluginStream(PluginInstance* instance,
-               const char* url,
-               bool need_notify,
-               void* notify_data);
-
-  // Opens the stream to the Plugin.
-  // If the mime-type is not specified, we'll try to find one based on the
-  // mime-types table and the extension (if any) in the URL.
-  // If the size of the stream is known, use length to set the size.  If
-  // not known, set length to 0.
-  // The request_is_seekable parameter indicates whether byte range requests
-  // can be issued on the stream.
-  bool Open(const std::string &mime_type,
-            const std::string &headers,
-            uint32 length,
-            uint32 last_modified,
-            bool request_is_seekable);
-
-  // Writes to the stream.
-  int Write(const char* buf, const int len, int data_offset);
-
-  // Write the result as a file.
-  void WriteAsFile();
-
-  // Notify the plugin that a stream is complete.
-  void Notify(NPReason reason);
-
-  // Close the stream.
-  virtual bool Close(NPReason reason);
-
-  virtual WebPluginResourceClient* AsResourceClient();
-
-  // Cancels any HTTP requests initiated by the stream.
-  virtual void CancelRequest() {}
-
-  NPStream* stream() { return &stream_; }
-
-  PluginInstance* instance() { return instance_.get(); }
-
-  // setter/getter for the seekable attribute on the stream.
-  bool seekable() const { return seekable_stream_; }
-
-  void set_seekable(bool seekable) { seekable_stream_ = seekable; }
-
-  // getters for reading the notification related attributes on the stream.
-  bool notify_needed() const { return notify_needed_; }
-
-  void* notify_data() const { return notify_data_; }
-
- protected:
-  friend class base::RefCounted<PluginStream>;
-
-  virtual ~PluginStream();
-
-  // Check if the stream is open.
-  bool open() { return opened_; }
-
- private:
-  // Per platform method to reset the temporary file handle.
-  void ResetTempFileHandle();
-
-  // Per platform method to reset the temporary file name.
-  void ResetTempFileName();
-
-  // Open a temporary file for this stream.
-  // If successful, will set temp_file_name_, temp_file_handle_, and
-  // return true.
-  bool OpenTempFile();
-
-  // Closes the temporary file if it is open.
-  void CloseTempFile();
-
-  // Sends the data to the file. Called From WriteToFile.
-  size_t WriteBytes(const char* buf, size_t length);
-
-  // Sends the data to the file if it's open.
-  bool WriteToFile(const char* buf, size_t length);
-
-  // Sends the data to the plugin.  If it's not ready, handles buffering it
-  // and retrying later.
-  bool WriteToPlugin(const char* buf, const int length, const int data_offset);
-
-  // Send the data to the plugin, returning how many bytes it accepted, or -1
-  // if an error occurred.
-  int TryWriteToPlugin(const char* buf, const int length,
-                       const int data_offset);
-
-  // The callback which calls TryWriteToPlugin.
-  void OnDelayDelivery();
-
-  // Returns true if the temp file is valid and open for writing.
-  bool TempFileIsValid() const;
-
-  // Returns true if |requested_plugin_mode_| is NP_ASFILE or NP_ASFILEONLY.
-  bool RequestedPluginModeIsAsFile() const;
-
- private:
-  NPStream                      stream_;
-  std::string                   headers_;
-  scoped_refptr<PluginInstance> instance_;
-  bool                          notify_needed_;
-  void*                         notify_data_;
-  bool                          close_on_write_data_;
-  uint16                        requested_plugin_mode_;
-  bool                          opened_;
-#if defined(OS_WIN)
-  char                          temp_file_name_[MAX_PATH];
-  HANDLE                        temp_file_handle_;
-#elif defined(OS_POSIX)
-  FILE*                         temp_file_;
-  base::FilePath                temp_file_path_;
-#endif
-  std::vector<char>             delivery_data_;
-  int                           data_offset_;
-  bool                          seekable_stream_;
-  std::string                   mime_type_;
-  DISALLOW_COPY_AND_ASSIGN(PluginStream);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_NPAPI_PLUGIN_STREAM_H_