Ensure that AccessibilityWinBrowserTest.TestRenderAccessibility passes when a screen reader is running.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/2826008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@50256 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 33 insertions, 0 deletions

diff --git a/chrome/browser/accessibility_win_browsertest.cc b/chrome/browser/accessibility_win_browsertest.cc
index 2199a07..d6bc3da 100644
--- a/chrome/browser/accessibility_win_browsertest.cc
+++ b/chrome/browser/accessibility_win_browsertest.cc
@@ -19,10 +19,43 @@
 namespace {
 
 class AccessibilityWinBrowserTest : public InProcessBrowserTest {
+ public:
+  AccessibilityWinBrowserTest() : screenreader_running_(FALSE) {}
+
+  // InProcessBrowserTest
+  void SetUpInProcessBrowserTestFixture();
+  void TearDownInProcessBrowserTestFixture();
+
  protected:
   IAccessible* GetRenderWidgetHostViewClientAccessible();
+
+ private:
+  BOOL screenreader_running_;
 };
 
+void AccessibilityWinBrowserTest::SetUpInProcessBrowserTestFixture() {
+  // This test assumes the windows system-wide SPI_SETSCREENREADER flag is
+  // cleared.
+  if (SystemParametersInfo(SPI_GETSCREENREADER, 0, &screenreader_running_, 0) &&
+      screenreader_running_) {
+    // Clear the SPI_SETSCREENREADER flag and notify active applications about
+    // the setting change.
+    ::SystemParametersInfo(SPI_SETSCREENREADER, FALSE, NULL, 0);
+    ::SendNotifyMessage(
+        HWND_BROADCAST, WM_SETTINGCHANGE, SPI_GETSCREENREADER, 0);
+  }
+}
+
+void AccessibilityWinBrowserTest::TearDownInProcessBrowserTestFixture() {
+  if (screenreader_running_) {
+    // Restore the SPI_SETSCREENREADER flag and notify active applications about
+    // the setting change.
+    ::SystemParametersInfo(SPI_SETSCREENREADER, TRUE, NULL, 0);
+    ::SendNotifyMessage(
+        HWND_BROADCAST, WM_SETTINGCHANGE, SPI_GETSCREENREADER, 0);
+  }
+}
+
 class AccessibleChecker {
  public:
   AccessibleChecker(std::wstring expected_name, int32 expected_role);