Simplify FrameConsumer interface. Remove FrameProducer interface.

remoting/codec/video_decoder_verbatim.cc

Index: remoting/codec/video_decoder_verbatim.cc
diff --git a/remoting/codec/video_decoder_verbatim.cc b/remoting/codec/video_decoder_verbatim.cc
index dd8c2f331d8cd84ce515a27136fcec053f9db4a9..1c2fba10dcb35fc44c102ecd6368140458c1d2de 100644
--- a/remoting/codec/video_decoder_verbatim.cc
+++ b/remoting/codec/video_decoder_verbatim.cc
@@ -13,20 +13,16 @@ VideoDecoderVerbatim::VideoDecoderVerbatim() {}
 
 VideoDecoderVerbatim::~VideoDecoderVerbatim() {}
 
-void VideoDecoderVerbatim::Initialize(const webrtc::DesktopSize& screen_size) {
-  updated_region_.Clear();
-  screen_buffer_.reset();
-
-  screen_size_ = screen_size;
+bool VideoDecoderVerbatim::DecodePacket(const VideoPacket& packet) {
+  webrtc::DesktopSize screen_size(packet.format().screen_width(),
+                                  packet.format().screen_height());
   // Allocate the screen buffer, if necessary.
-  if (!screen_size_.is_empty()) {
-    screen_buffer_.reset(
-        new uint8[screen_size_.width() * screen_size_.height() *
-                  kBytesPerPixel]);
+  if (!screen_size.equals(screen_size_)) {
+    screen_size_ = screen_size;
+    screen_buffer_.reset(new uint8[screen_size_.width() *
+                                   screen_size_.height() * kBytesPerPixel]);
   }
-}
 
-bool VideoDecoderVerbatim::DecodePacket(const VideoPacket& packet) {
   webrtc::DesktopRegion region;
 
   const char* in = packet.data().data();