Remove unused VideoFrameCapturer::size_most_recent() method.

remoting/host/desktop_session_agent.cc

Index: remoting/host/desktop_session_agent.cc
diff --git a/remoting/host/desktop_session_agent.cc b/remoting/host/desktop_session_agent.cc
index aec9c1ea60ad0e0e5717abbe01b9bc504f07e51b..d3a80138cdf96ae60fce910e89ef32eac5d5a97c 100644
--- a/remoting/host/desktop_session_agent.cc
+++ b/remoting/host/desktop_session_agent.cc
@@ -217,6 +217,8 @@ void DesktopSessionAgent::OnCaptureCompleted(
     scoped_refptr<CaptureData> capture_data) {
   DCHECK(video_capture_task_runner()->BelongsToCurrentThread());
 
+  size_most_recent_ = capture_data->size();
+
   // Serialize CaptureData
   SerializedCapturedData serialized_data;
   serialized_data.shared_buffer_id = capture_data->shared_buffer()->id();
@@ -341,7 +343,7 @@ void DesktopSessionAgent::OnInvalidateRegion(
     return;
   }
 
-  SkIRect bounds = SkIRect::MakeSize(video_capturer_->size_most_recent());
+  SkIRect bounds = SkIRect::MakeSize(size_most_recent_);
 
   // Convert |invalid_rects| into a region.
   SkRegion invalid_region;
@@ -513,6 +515,7 @@ DesktopSessionAgent::DesktopSessionAgent(
       io_task_runner_(io_task_runner),
       video_capture_task_runner_(video_capture_task_runner),
       next_shared_buffer_id_(1),
+      size_most_recent_(SkISize::Make(0, 0)),
       started_(false) {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());
 }