Track referenced files of subframes in PageState.

BUG=441966
TEST=Upload a previously selected file from subframe form after restore.

Review URL: https://codereview.chromium.org/805563003

Cr-Commit-Position: refs/heads/master@{#308238}

content/browser/frame_host/render_frame_host_manager_browsertest.cc

@@ -1543,21 +1543,21 @@ class FileChooserDelegate : public WebContentsDelegate {
 IN_PROC_BROWSER_TEST_F(RenderFrameHostManagerTest,
                        RestoreFileAccessForHistoryNavigation) {
   StartServer();
-  base::FilePath file_path;
-  EXPECT_TRUE(PathService::Get(base::DIR_TEMP, &file_path));
-  file_path = file_path.AppendASCII("bar");
+  base::FilePath file;
+  EXPECT_TRUE(PathService::Get(base::DIR_TEMP, &file));
+  file = file.AppendASCII("bar");
 
   // Navigate to url and get it to reference a file in its PageState.
   GURL url1(test_server()->GetURL("files/file_input.html"));
   NavigateToURL(shell(), url1);
   int process_id = shell()->web_contents()->GetRenderProcessHost()->GetID();
-  scoped_ptr<FileChooserDelegate> delegate(new FileChooserDelegate(file_path));
+  scoped_ptr<FileChooserDelegate> delegate(new FileChooserDelegate(file));
   shell()->web_contents()->SetDelegate(delegate.get());
   EXPECT_TRUE(ExecuteScript(shell()->web_contents(),
                             "document.getElementById('fileinput').click();"));
   EXPECT_TRUE(delegate->file_chosen());
   EXPECT_TRUE(ChildProcessSecurityPolicyImpl::GetInstance()->CanReadFile(
-      process_id, file_path));
+      process_id, file));
 
   // Navigate to a different process without access to the file, and wait for
   // the old process to exit.
@@ -1567,16 +1567,16 @@ IN_PROC_BROWSER_TEST_F(RenderFrameHostManagerTest,
   NavigateToURL(shell(), GetCrossSiteURL("files/title1.html"));
   exit_observer.Wait();
   EXPECT_FALSE(ChildProcessSecurityPolicyImpl::GetInstance()->CanReadFile(
-      shell()->web_contents()->GetRenderProcessHost()->GetID(), file_path));
+      shell()->web_contents()->GetRenderProcessHost()->GetID(), file));
 
   // Ensure that the file ended up in the PageState of the previous entry.
   NavigationEntry* prev_entry =
       shell()->web_contents()->GetController().GetEntryAtIndex(0);
   EXPECT_EQ(url1, prev_entry->GetURL());
-  const std::vector<base::FilePath>& file_paths =
+  const std::vector<base::FilePath>& files =
       prev_entry->GetPageState().GetReferencedFiles();
-  ASSERT_EQ(1U, file_paths.size());
-  EXPECT_EQ(file_path, file_paths.at(0));
+  ASSERT_EQ(1U, files.size());
+  EXPECT_EQ(file, files.at(0));
 
   // Go back, ending up in a different RenderProcessHost than before.
   TestNavigationObserver back_nav_load_observer(shell()->web_contents());
@@ -1587,7 +1587,7 @@ IN_PROC_BROWSER_TEST_F(RenderFrameHostManagerTest,
 
   // Ensure that the file access still exists in the new process ID.
   EXPECT_TRUE(ChildProcessSecurityPolicyImpl::GetInstance()->CanReadFile(
-      shell()->web_contents()->GetRenderProcessHost()->GetID(), file_path));
+      shell()->web_contents()->GetRenderProcessHost()->GetID(), file));
 
   // Navigate to a same site page to trigger a PageState update and ensure the
   // renderer is not killed.
@@ -1595,4 +1595,57 @@ IN_PROC_BROWSER_TEST_F(RenderFrameHostManagerTest,
       NavigateToURL(shell(), test_server()->GetURL("files/title2.html")));
 }
 
+// Test for http://crbug.com/441966.
+IN_PROC_BROWSER_TEST_F(RenderFrameHostManagerTest,
+                       RestoreSubframeFileAccessForHistoryNavigation) {
+  StartServer();
+  base::FilePath file;
+  EXPECT_TRUE(PathService::Get(base::DIR_TEMP, &file));
+  file = file.AppendASCII("bar");
+
+  // Navigate to url and get it to reference a file in its PageState.
+  GURL url1(test_server()->GetURL("files/file_input_subframe.html"));
+  NavigateToURL(shell(), url1);
+  WebContentsImpl* wc = static_cast<WebContentsImpl*>(shell()->web_contents());
+  FrameTreeNode* root = wc->GetFrameTree()->root();
+  int process_id = shell()->web_contents()->GetRenderProcessHost()->GetID();
+  scoped_ptr<FileChooserDelegate> delegate(new FileChooserDelegate(file));
+  shell()->web_contents()->SetDelegate(delegate.get());
+  EXPECT_TRUE(ExecuteScript(root->child_at(0)->current_frame_host(),
+                            "document.getElementById('fileinput').click();"));
+  EXPECT_TRUE(delegate->file_chosen());
+  EXPECT_TRUE(ChildProcessSecurityPolicyImpl::GetInstance()->CanReadFile(
+      process_id, file));
+
+  // Navigate to a different process without access to the file, and wait for
+  // the old process to exit.
+  RenderProcessHostWatcher exit_observer(
+      shell()->web_contents()->GetRenderProcessHost(),
+      RenderProcessHostWatcher::WATCH_FOR_HOST_DESTRUCTION);
+  NavigateToURL(shell(), GetCrossSiteURL("files/title1.html"));
+  exit_observer.Wait();
+  EXPECT_FALSE(ChildProcessSecurityPolicyImpl::GetInstance()->CanReadFile(
+      shell()->web_contents()->GetRenderProcessHost()->GetID(), file));
+
+  // Ensure that the file ended up in the PageState of the previous entry.
+  NavigationEntry* prev_entry =
+      shell()->web_contents()->GetController().GetEntryAtIndex(0);
+  EXPECT_EQ(url1, prev_entry->GetURL());
+  const std::vector<base::FilePath>& files =
+      prev_entry->GetPageState().GetReferencedFiles();
+  ASSERT_EQ(1U, files.size());
+  EXPECT_EQ(file, files.at(0));
+
+  // Go back, ending up in a different RenderProcessHost than before.
+  TestNavigationObserver back_nav_load_observer(shell()->web_contents());
+  shell()->web_contents()->GetController().GoBack();
+  back_nav_load_observer.Wait();
+  EXPECT_NE(process_id,
+            shell()->web_contents()->GetRenderProcessHost()->GetID());
+
+  // Ensure that the file access still exists in the new process ID.
+  EXPECT_TRUE(ChildProcessSecurityPolicyImpl::GetInstance()->CanReadFile(
+      shell()->web_contents()->GetRenderProcessHost()->GetID(), file));
+}
+
 }  // namespace content

content/common/page_state_serialization.h

@@ -68,6 +68,9 @@ private:
 };
 
 struct CONTENT_EXPORT ExplodedPageState {
+  // TODO(creis): Move referenced_files to ExplodedFrameState.
+  // It currently contains a list from all frames, but cannot be deserialized
+  // into the files referenced by each frame.  See http://crbug.com/441966.
   std::vector<base::NullableString16> referenced_files;
   ExplodedFrameState top;
 

content/renderer/history_serialization.cc

@@ -26,7 +26,7 @@ namespace {
 
 void ToNullableString16Vector(const WebVector<WebString>& input,
                               std::vector<base::NullableString16>* output) {
-  output->reserve(input.size());
+  output->reserve(output->size() + input.size());
   for (size_t i = 0; i < input.size(); ++i)
     output->push_back(input[i]);
 }
@@ -114,14 +114,20 @@ void GenerateFrameStateFromItem(const WebHistoryItem& item,
   }
 }
 
-void RecursivelyGenerateFrameState(HistoryEntry::HistoryNode* node,
-                                   ExplodedFrameState* state) {
+void RecursivelyGenerateFrameState(
+    HistoryEntry::HistoryNode* node,
+    ExplodedFrameState* state,
+    std::vector<base::NullableString16>* referenced_files) {
   GenerateFrameStateFromItem(node->item(), state);
+  ToNullableString16Vector(node->item().getReferencedFilePaths(),
+                           referenced_files);
 
   std::vector<HistoryEntry::HistoryNode*>& children = node->children();
   state->children.resize(children.size());
-  for (size_t i = 0; i < children.size(); ++i)
-    RecursivelyGenerateFrameState(children[i], &state->children[i]);
+  for (size_t i = 0; i < children.size(); ++i) {
+    RecursivelyGenerateFrameState(children[i], &state->children[i],
+                                  referenced_files);
+  }
 }
 
 void RecursivelyGenerateHistoryItem(const ExplodedFrameState& state,
@@ -169,10 +175,8 @@ void RecursivelyGenerateHistoryItem(const ExplodedFrameState& state,
 
 PageState HistoryEntryToPageState(HistoryEntry* entry) {
   ExplodedPageState state;
-  ToNullableString16Vector(entry->root().getReferencedFilePaths(),
-                           &state.referenced_files);
-
-  RecursivelyGenerateFrameState(entry->root_history_node(), &state.top);
+  RecursivelyGenerateFrameState(entry->root_history_node(), &state.top,
+                                &state.referenced_files);
 
   std::string encoded_data;
   if (!EncodePageState(state, &encoded_data))

content/test/data/file_input_subframe.html

+<iframe srcdoc="<form action='title2.html' enctype='multipart/form-data' method='post'><input type='file' id='fileinput' /></form>">
+</iframe>