More aggressive IO asserts in content_browsertests.

content/browser/webui/web_ui_mojo_browsertest.cc

 // Copyright 2014 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 <limits>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "base/strings/string_util.h"
+#include "base/threading/thread_restrictions.h"
 #include "content/browser/webui/web_ui_controller_factory_registry.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_ui_controller.h"
 #include "content/public/browser/web_ui_data_source.h"
 #include "content/public/common/content_paths.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/url_utils.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/shell/browser/shell.h"
 #include "content/test/data/web_ui_test_mojo_bindings.mojom.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "services/shell/public/cpp/interface_registry.h"
 
 namespace content {
 namespace {
 
 base::FilePath GetFilePathForJSResource(const std::string& path) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io_from_test_callbacks;
+
   std::string binding_path = "gen/" + path + ".js";
 #if defined(OS_WIN)
   base::ReplaceChars(binding_path, "//", "\\", &binding_path);
 #endif
   base::FilePath exe_dir;
   PathService::Get(base::DIR_EXE, &exe_dir);
   return exe_dir.AppendASCII(binding_path);
 }
 
 bool got_message = false;
 
 // The bindings for the page are generated from a .mojom file. This code looks
 // up the generated file from disk and returns it.
 bool GetResource(const std::string& id,
                  const WebUIDataSource::GotDataCallback& callback) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io_from_test_callbacks;
+
   if (id.find(".mojom") != std::string::npos) {
     std::string contents;
     CHECK(base::ReadFileToString(GetFilePathForJSResource(id), &contents))
         << id;
     base::RefCountedString* ref_contents = new base::RefCountedString;
     ref_contents->data() = contents;
     callback.Run(ref_contents);
     return true;
   }
 
@@ skipping 125 matching lines @@
   TestWebUIControllerFactory factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebUIMojoTest);
 };
 
 bool IsGeneratedResourceAvailable(const std::string& resource_path) {
   // Currently there is no way to have a generated file included in the isolate
   // files. If the bindings file doesn't exist assume we're on such a bot and
   // pass.
   // TODO(sky): remove this conditional when isolates support copying from gen.
+  base::ThreadRestrictions::ScopedAllowIO allow_io_for_file_existance_check;
   const base::FilePath test_file_path(GetFilePathForJSResource(resource_path));
   if (base::PathExists(test_file_path))
     return true;
   LOG(WARNING) << " mojom binding file doesn't exist, assuming on isolate";
   return false;
 }
 
 // Loads a webui page that contains mojo bindings and verifies a message makes
 // it from the browser to the page and back.
 IN_PROC_BROWSER_TEST_F(WebUIMojoTest, EndToEndPing) {
@@ skipping 20 matching lines @@
   NavigateToURL(other_shell, test_url);
   // RunLoop is quit when message received from page.
   other_run_loop.Run();
   EXPECT_TRUE(got_message);
   EXPECT_EQ(shell()->web_contents()->GetRenderProcessHost(),
             other_shell->web_contents()->GetRenderProcessHost());
 }
 
 }  // namespace
 }  // namespace content