Clarify resolution change behaviors of video capture devices

content/browser/media/capture/content_video_capture_device_core.cc

Index: content/browser/media/capture/content_video_capture_device_core.cc
diff --git a/content/browser/media/capture/content_video_capture_device_core.cc b/content/browser/media/capture/content_video_capture_device_core.cc
index 8152b3dbe0e9cc19636190fff20137c9555ec88f..87efe021178da7de16dbaead34ed630b073f0b12 100644
--- a/content/browser/media/capture/content_video_capture_device_core.cc
+++ b/content/browser/media/capture/content_video_capture_device_core.cc
@@ -150,7 +150,8 @@ void ThreadSafeCaptureOracle::UpdateCaptureSize(const gfx::Size& source_size) {
   // If this is the first call to UpdateCaptureSize(), or the receiver supports
   // variable resolution, then determine the capture size by treating the
   // requested width and height as maxima.
-  if (!capture_size_updated_ || params_.allow_resolution_change) {
+  if (!capture_size_updated_ || params_.resolution_change_policy ==
+      media::RESOLUTION_POLICY_DYNAMIC_WITHIN_LIMIT) {

[perkj_chrome, 2014/09/07 14:07:09]

I am not sure if this is the correct intdentation or if
media::RESOLUTION_POLICY_DYNAMIC_WITHIN_LIMIT should be indendet 4 more spaces. 

if (!capture_size_updated_ ||
    params_.resolution_change_policy ==
        params_.resolution_change_policy) {

     // The capture resolution should not exceed the source frame size.
     // In other words it should downscale the image but not upscale it.
     if (source_size.width() > params_.requested_format.frame_size.width() ||