Disable screenshot uploading if there has been user input.

chrome/browser/chromeos/policy/remote_commands/device_command_screenshot_job.cc

 // Copyright 2015 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/chromeos/policy/remote_commands/device_command_screenshot_job.h"
 
 #include <fstream>
 
 #include "ash/shell.h"
 #include "base/bind.h"
@@ skipping 172 matching lines @@
   }
   upload_job_->Start();
 }
 
 void DeviceCommandScreenshotJob::RunImpl(
     const CallbackWithResult& succeeded_callback,
     const CallbackWithResult& failed_callback) {
   succeeded_callback_ = succeeded_callback;
   failed_callback_ = failed_callback;
 
-  upload_job_ = screenshot_delegate_->CreateUploadJob(upload_url_, this);
-  DCHECK(upload_job_);
+  // Fail if the delegate says screenshots are not allowed in this session.
+  if (!screenshot_delegate_->IsScreenshotAllowed()) {
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
+        FROM_HERE,
+        base::Bind(failed_callback_, base::Passed(make_scoped_ptr(
+                                         new Payload(FAILURE_USER_INPUT)))));
+  }
 
   aura::Window::Windows root_windows = ash::Shell::GetAllRootWindows();
 
   // Immediately fail if there are no attached screens.
   if (root_windows.size() == 0) {
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE,
         base::Bind(failed_callback_, base::Passed(make_scoped_ptr(new Payload(
                                          FAILURE_SCREENSHOT_ACQUISITION)))));
   }
 
+  upload_job_ = screenshot_delegate_->CreateUploadJob(upload_url_, this);
+  DCHECK(upload_job_);
+
   // Post tasks to the sequenced worker pool for taking screenshots on each
   // attached screen.
   num_pending_screenshots_ = root_windows.size();
   for (size_t screen = 0; screen < root_windows.size(); ++screen) {
     aura::Window* root_window = root_windows[screen];
     gfx::Rect rect = root_window->bounds();
     screenshot_delegate_->TakeSnapshot(
         root_window, rect,
         base::Bind(&RunStoreScreenshotOnTaskRunner,
                    base::Bind(&DeviceCommandScreenshotJob::StoreScreenshot,
                               weak_ptr_factory_.GetWeakPtr(), screen),
                    base::ThreadTaskRunnerHandle::Get()));
   }
 }
 
 void DeviceCommandScreenshotJob::TerminateImpl() {
   weak_ptr_factory_.InvalidateWeakPtrs();
 }
 
 }  // namespace policy