Windows video capture: Remove duplicated code from GetDeviceSupportedFormats*

media/video/capture/win/capability_list_win.cc

 // Copyright (c) 2012 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 "media/video/capture/win/capability_list_win.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 
@@ skipping 53 matching lines @@
   // requested resolution and the camera capability.
   for (Capabilities::const_iterator it = capabilities_.begin();
        it != capabilities_.end(); ++it) {
     ResolutionDiff diff;
     diff.capability = &(*it);
     diff.diff_width = it->supported_format.frame_size.width() - requested_width;
     diff.diff_height =
         it->supported_format.frame_size.height() - requested_height;
     // The 1000 allows using integer arithmetic for f.i. 29.971 fps.
     diff.diff_frame_rate =
-        1000 * ((static_cast<float>(it->frame_rate_numerator) /
-                 it->frame_rate_denominator) -
-                requested_frame_rate);
+        1000 * (it->supported_format.frame_rate - requested_frame_rate);
     diff_list.push_back(diff);
   }
 
   // Sort the best height candidates.
   diff_list.sort(&CompareHeight);
   int best_diff = diff_list.front().diff_height;
   for (std::list<ResolutionDiff>::iterator it = diff_list.begin();
        it != diff_list.end(); ++it) {
     if (it->diff_height != best_diff) {
       // Remove all candidates but the best.
@@ skipping 23 matching lines @@
       diff_list.erase(it, diff_list.end());
       break;
     }
   }
 
   // Decide the best color format.
   diff_list.sort(&CompareColor);
   return *diff_list.front().capability;
 }
 
+void CapabilityList::CapabilitiesToVideoCaptureFormats(
+    VideoCaptureFormats* formats) const {
+  for (Capabilities::const_iterator it = capabilities_.begin();
+       it != capabilities_.end(); ++it) {
+    formats->push_back(it->supported_format);
+  }
+}
+
 }  // namespace media