Move more files from chrome/browser/nacl_host/ to components/nacl/browser/

chrome/browser/nacl_host/nacl_file_host.cc

Index: chrome/browser/nacl_host/nacl_file_host.cc
diff --git a/chrome/browser/nacl_host/nacl_file_host.cc b/chrome/browser/nacl_host/nacl_file_host.cc
deleted file mode 100644
index 14f895edfd30611368a0d61cbd7186e8ddab906e..0000000000000000000000000000000000000000
--- a/chrome/browser/nacl_host/nacl_file_host.cc
+++ /dev/null
@@ -1,249 +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.
-
-#include "chrome/browser/nacl_host/nacl_file_host.h"
-
-#include "base/bind.h"
-#include "base/file_util.h"
-#include "base/files/file_path.h"
-#include "base/path_service.h"
-#include "base/platform_file.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/threading/sequenced_worker_pool.h"
-#include "chrome/browser/nacl_host/nacl_host_message_filter.h"
-#include "components/nacl/browser/nacl_browser.h"
-#include "components/nacl/browser/nacl_browser_delegate.h"
-#include "components/nacl/common/nacl_host_messages.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/render_view_host.h"
-#include "content/public/browser/site_instance.h"
-#include "ipc/ipc_platform_file.h"
-
-using content::BrowserThread;
-
-namespace {
-
-// Force a prefix to prevent user from opening "magic" files.
-const char* kExpectedFilePrefix = "pnacl_public_";
-
-// Restrict PNaCl file lengths to reduce likelyhood of hitting bugs
-// in file name limit error-handling-code-paths, etc.
-const size_t kMaxFileLength = 40;
-
-void NotifyRendererOfError(
-    NaClHostMessageFilter* nacl_host_message_filter,
-    IPC::Message* reply_msg) {
-  reply_msg->set_reply_error();
-  nacl_host_message_filter->Send(reply_msg);
-}
-
-bool PnaclDoOpenFile(const base::FilePath& file_to_open,
-                     base::PlatformFile* out_file) {
-  base::PlatformFileError error_code;
-  *out_file = base::CreatePlatformFile(file_to_open,
-                                       base::PLATFORM_FILE_OPEN |
-                                       base::PLATFORM_FILE_READ,
-                                       NULL,
-                                       &error_code);
-  if (error_code != base::PLATFORM_FILE_OK) {
-    return false;
-  }
-  return true;
-}
-
-void DoOpenPnaclFile(
-    scoped_refptr<NaClHostMessageFilter> nacl_host_message_filter,
-    const std::string& filename,
-    IPC::Message* reply_msg) {
-  DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
-  base::FilePath full_filepath;
-
-  // PNaCl must be installed.
-  base::FilePath pnacl_dir;
-  if (!nacl::NaClBrowser::GetDelegate()->GetPnaclDirectory(&pnacl_dir) ||
-      !base::PathExists(pnacl_dir)) {
-    NotifyRendererOfError(nacl_host_message_filter.get(), reply_msg);
-    return;
-  }
-
-  // Do some validation.
-  if (!nacl_file_host::PnaclCanOpenFile(filename, &full_filepath)) {
-    NotifyRendererOfError(nacl_host_message_filter.get(), reply_msg);
-    return;
-  }
-
-  base::PlatformFile file_to_open;
-  if (!PnaclDoOpenFile(full_filepath, &file_to_open)) {
-    NotifyRendererOfError(nacl_host_message_filter.get(), reply_msg);
-    return;
-  }
-
-  // Send the reply!
-  // Do any DuplicateHandle magic that is necessary first.
-  IPC::PlatformFileForTransit target_desc =
-      IPC::GetFileHandleForProcess(file_to_open,
-                                   nacl_host_message_filter->PeerHandle(),
-                                   true /* Close source */);
-  if (target_desc == IPC::InvalidPlatformFileForTransit()) {
-    NotifyRendererOfError(nacl_host_message_filter.get(), reply_msg);
-    return;
-  }
-  NaClHostMsg_GetReadonlyPnaclFD::WriteReplyParams(
-      reply_msg, target_desc);
-  nacl_host_message_filter->Send(reply_msg);
-}
-
-void DoRegisterOpenedNaClExecutableFile(
-    scoped_refptr<NaClHostMessageFilter> nacl_host_message_filter,
-    base::PlatformFile file,
-    base::FilePath file_path,
-    IPC::Message* reply_msg) {
-  // IO thread owns the NaClBrowser singleton.
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-
-  nacl::NaClBrowser* nacl_browser = nacl::NaClBrowser::GetInstance();
-  uint64 file_token_lo = 0;
-  uint64 file_token_hi = 0;
-  nacl_browser->PutFilePath(file_path, &file_token_lo, &file_token_hi);
-
-  IPC::PlatformFileForTransit file_desc = IPC::GetFileHandleForProcess(
-      file,
-      nacl_host_message_filter->PeerHandle(),
-      true /* close_source */);
-
-  NaClHostMsg_OpenNaClExecutable::WriteReplyParams(
-      reply_msg, file_desc, file_token_lo, file_token_hi);
-  nacl_host_message_filter->Send(reply_msg);
-}
-
-// Convert the file URL into a file descriptor.
-// This function is security sensitive.  Be sure to check with a security
-// person before you modify it.
-void DoOpenNaClExecutableOnThreadPool(
-    scoped_refptr<NaClHostMessageFilter> nacl_host_message_filter,
-    const GURL& file_url,
-    IPC::Message* reply_msg) {
-  DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
-
-  base::FilePath file_path;
-  if (!nacl::NaClBrowser::GetDelegate()->MapUrlToLocalFilePath(
-          file_url, true /* use_blocking_api */, &file_path)) {
-    NotifyRendererOfError(nacl_host_message_filter.get(), reply_msg);
-    return;
-  }
-
-  base::PlatformFile file;
-  nacl::OpenNaClExecutableImpl(file_path, &file);
-  if (file != base::kInvalidPlatformFileValue) {
-    // This function is running on the blocking pool, but the path needs to be
-    // registered in a structure owned by the IO thread.
-    BrowserThread::PostTask(
-        BrowserThread::IO, FROM_HERE,
-        base::Bind(
-            &DoRegisterOpenedNaClExecutableFile,
-            nacl_host_message_filter,
-            file, file_path, reply_msg));
-  } else {
-    NotifyRendererOfError(nacl_host_message_filter.get(), reply_msg);
-    return;
-  }
-}
-
-}  // namespace
-
-namespace nacl_file_host {
-
-void GetReadonlyPnaclFd(
-    scoped_refptr<NaClHostMessageFilter> nacl_host_message_filter,
-    const std::string& filename,
-    IPC::Message* reply_msg) {
-  if (!BrowserThread::PostBlockingPoolTask(
-          FROM_HERE,
-          base::Bind(&DoOpenPnaclFile,
-                     nacl_host_message_filter,
-                     filename,
-                     reply_msg))) {
-    NotifyRendererOfError(nacl_host_message_filter.get(), reply_msg);
-  }
-}
-
-// This function is security sensitive.  Be sure to check with a security
-// person before you modify it.
-bool PnaclCanOpenFile(const std::string& filename,
-                      base::FilePath* file_to_open) {
-  if (filename.length() > kMaxFileLength)
-    return false;
-
-  if (filename.empty())
-    return false;
-
-  // Restrict character set of the file name to something really simple
-  // (a-z, 0-9, and underscores).
-  for (size_t i = 0; i < filename.length(); ++i) {
-    char charAt = filename[i];
-    if (charAt < 'a' || charAt > 'z')
-      if (charAt < '0' || charAt > '9')
-        if (charAt != '_')
-          return false;
-  }
-
-  // PNaCl must be installed.
-  base::FilePath pnacl_dir;
-  if (!nacl::NaClBrowser::GetDelegate()->GetPnaclDirectory(&pnacl_dir) ||
-      pnacl_dir.empty())
-    return false;
-
-  // Prepend the prefix to restrict files to a whitelisted set.
-  base::FilePath full_path = pnacl_dir.AppendASCII(
-      std::string(kExpectedFilePrefix) + filename);
-  *file_to_open = full_path;
-  return true;
-}
-
-void OpenNaClExecutable(
-    scoped_refptr<NaClHostMessageFilter> nacl_host_message_filter,
-    int render_view_id,
-    const GURL& file_url,
-    IPC::Message* reply_msg) {
-  if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
-    BrowserThread::PostTask(
-        BrowserThread::UI, FROM_HERE,
-        base::Bind(
-            &OpenNaClExecutable,
-            nacl_host_message_filter,
-            render_view_id, file_url, reply_msg));
-    return;
-  }
-
-  // Make sure render_view_id is valid and that the URL is a part of the
-  // render view's site. Without these checks, apps could probe the extension
-  // directory or run NaCl code from other extensions.
-  content::RenderViewHost* rvh = content::RenderViewHost::FromID(
-      nacl_host_message_filter->render_process_id(), render_view_id);
-  if (!rvh) {
-    nacl_host_message_filter->BadMessageReceived();  // Kill the renderer.
-    return;
-  }
-  content::SiteInstance* site_instance = rvh->GetSiteInstance();
-  if (!content::SiteInstance::IsSameWebSite(site_instance->GetBrowserContext(),
-                                            site_instance->GetSiteURL(),
-                                            file_url)) {
-    NotifyRendererOfError(nacl_host_message_filter.get(), reply_msg);
-    return;
-  }
-
-  // The URL is part of the current app. Now query the extension system for the
-  // file path and convert that to a file descriptor. This should be done on a
-  // blocking pool thread.
-  if (!BrowserThread::PostBlockingPoolTask(
-      FROM_HERE,
-      base::Bind(
-          &DoOpenNaClExecutableOnThreadPool,
-          nacl_host_message_filter,
-          file_url, reply_msg))) {
-    NotifyRendererOfError(nacl_host_message_filter.get(), reply_msg);
-  }
-}
-
-}  // namespace nacl_file_host