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

content/child/npapi/plugin_stream_win.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.h"
-
-#include "base/logging.h"
-#include "content/child/npapi/plugin_instance.h"
-
-namespace content {
-
-void PluginStream::ResetTempFileHandle() {
-  temp_file_handle_ = INVALID_HANDLE_VALUE;
-}
-
-void PluginStream::ResetTempFileName() {
-  temp_file_name_[0] = '\0';
-}
-
-void PluginStream::WriteAsFile() {
-  if (RequestedPluginModeIsAsFile())
-    instance_->NPP_StreamAsFile(&stream_, temp_file_name_);
-}
-
-size_t PluginStream::WriteBytes(const char *buf, size_t length) {
-  DWORD bytes;
-
-  if (!WriteFile(temp_file_handle_, buf, length, &bytes, 0))
-    return 0U;
-
-  return static_cast<size_t>(bytes);
-}
-
-bool PluginStream::OpenTempFile() {
-  DCHECK_EQ(INVALID_HANDLE_VALUE, temp_file_handle_);
-
-  // The reason for using all the Ascii versions of these filesystem
-  // calls is that the filename which we pass back to the plugin
-  // via NPAPI is an ascii filename.  Otherwise, we'd use wide-chars.
-  //
-  // TODO:
-  // This is a bug in NPAPI itself, and it needs to be fixed.
-  // The case which will fail is if a user has a multibyte name,
-  // but has the system locale set to english.  GetTempPathA will
-  // return junk in this case, causing us to be unable to open the
-  // file.
-
-  char temp_directory[MAX_PATH];
-  if (GetTempPathA(MAX_PATH, temp_directory) == 0)
-    return false;
-  if (GetTempFileNameA(temp_directory, "npstream", 0, temp_file_name_) == 0)
-    return false;
-  temp_file_handle_ = CreateFileA(temp_file_name_,
-                                  FILE_ALL_ACCESS,
-                                  FILE_SHARE_READ,
-                                  0,
-                                  CREATE_ALWAYS,
-                                  FILE_ATTRIBUTE_NORMAL,
-                                  0);
-  if (temp_file_handle_ == INVALID_HANDLE_VALUE) {
-    ResetTempFileName();
-    return false;
-  }
-  return true;
-}
-
-void PluginStream::CloseTempFile() {
-  if (!TempFileIsValid())
-    return;
-
-  CloseHandle(temp_file_handle_);
-  ResetTempFileHandle();
-}
-
-bool PluginStream::TempFileIsValid() const {
-  return temp_file_handle_ != INVALID_HANDLE_VALUE;
-}
-
-}  // namespace content