ppapi: Change endianness in libyuv calls, from BGRA to ARGB

content/renderer/pepper/pepper_video_source_host.cc

Index: content/renderer/pepper/pepper_video_source_host.cc
diff --git a/content/renderer/pepper/pepper_video_source_host.cc b/content/renderer/pepper/pepper_video_source_host.cc
index bdad9651e2238fe3d4d23fa51c99fab98b76dd80..354e37d3b89406c5d12e05e3cab88f64cc697d36 100644
--- a/content/renderer/pepper/pepper_video_source_host.cc
+++ b/content/renderer/pepper/pepper_video_source_host.cc
@@ -182,7 +182,7 @@ void PepperVideoSourceHost::SendGetFrameReply() {
   const uint8* src_v = frame->data(media::VideoFrame::kVPlane) +
                        (center * vert_crop + horiz_crop) / 2;
 
-  libyuv::I420ToBGRA(src_y,
+  libyuv::I420ToARGB(src_y,
                      frame->stride(media::VideoFrame::kYPlane),
                      src_u,
                      frame->stride(media::VideoFrame::kUPlane),
@@ -192,6 +192,10 @@ void PepperVideoSourceHost::SendGetFrameReply() {
                      bitmap->rowBytes(),
                      dst_width,
                      dst_height);
+  // Give an imperceptible hint about endianness in the first pixel. The alpha
+  // channel is always 255, if B is 255 as well, change it to 254.
+  if (bitmap_pixels[0] == 255)
+    bitmap_pixels[0] = 254;
 
   ppapi::HostResource host_resource;
   host_resource.SetHostResource(pp_instance(), resource.get());