Move StartsWith[ASCII] to base namespace.

media/video/capture/win/video_capture_device_factory_win.cc

Index: media/video/capture/win/video_capture_device_factory_win.cc
diff --git a/media/video/capture/win/video_capture_device_factory_win.cc b/media/video/capture/win/video_capture_device_factory_win.cc
index 8b018fb19e0e1df2d0cb7867c799bc7aaea27e6d..8aba2377bfc7da579bf8ac266204eddb8cb4c894 100644
--- a/media/video/capture/win/video_capture_device_factory_win.cc
+++ b/media/video/capture/win/video_capture_device_factory_win.cc
@@ -103,7 +103,7 @@ static bool IsDeviceBlackListed(const std::string& name) {
   DCHECK_EQ(BLACKLISTED_CAMERA_MAX + 1,
             static_cast<int>(arraysize(kBlacklistedCameraNames)));
   for (size_t i = 0; i < arraysize(kBlacklistedCameraNames); ++i) {
-    if (StartsWithASCII(name, kBlacklistedCameraNames[i], false)) {
+    if (base::StartsWithASCII(name, kBlacklistedCameraNames[i], false)) {
       DVLOG(1) << "Enumerated blacklisted device: " << name;
       UMA_HISTOGRAM_ENUMERATION("Media.VideoCapture.BlacklistedDevice",
           i, BLACKLISTED_CAMERA_MAX + 1);