Allow temporary file system for incognito DevTools.

chrome/browser/ui/webui/devtools_ui.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 "chrome/browser/ui/webui/devtools_ui.h"
 
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/devtools_frontend_host.h"
+#include "content/public/browser/site_instance.h"
+#include "content/public/browser/storage_partition.h"
 #include "content/public/browser/url_data_source.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/common/user_agent.h"
 #include "net/base/escape.h"
 #include "net/base/filename_util.h"
 #include "net/base/load_flags.h"
 #include "net/base/url_util.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "net/url_request/url_request_context_getter.h"
+#include "storage/browser/fileapi/file_system_context.h"
 #include "third_party/WebKit/public/public_features.h"
 
 using content::BrowserThread;
 using content::WebContents;
 
 namespace {
 
 std::string PathWithoutParams(const std::string& path) {
   return GURL(std::string("chrome-devtools://devtools/") + path)
       .path().substr(1);
@@ skipping 392 matching lines @@
 
 DevToolsUI::DevToolsUI(content::WebUI* web_ui)
     : WebUIController(web_ui) {
   web_ui->SetBindings(0);
   Profile* profile = Profile::FromWebUI(web_ui);
   content::URLDataSource::Add(
       profile,
       new DevToolsDataSource(profile->GetRequestContext()));
 
   GURL url = web_ui->GetWebContents()->GetVisibleURL();
-  if (url.spec() == SanitizeFrontendURL(url).spec())
-    bindings_.reset(new DevToolsUIBindings(web_ui->GetWebContents()));
+  if (url.spec() != SanitizeFrontendURL(url).spec())
+    return;
+
+  if (profile->IsOffTheRecord()) {
+    GURL site = content::SiteInstance::GetSiteForURL(profile, url);

[kinuko, 2016/12/09 03:37:15]

Just to be extra sure, this URL is going to be devtools specific one, is that
right?

[dgozman, 2016/12/09 05:51:46]

Correct. We even sanitize it in line 444.

+    content::BrowserContext::GetStoragePartitionForSite(profile, site)->
+        GetFileSystemContext()->EnableTemporaryFileSystemInIncognito();
+  }
+  bindings_.reset(new DevToolsUIBindings(web_ui->GetWebContents()));
 }
 
 DevToolsUI::~DevToolsUI() {
 }