[Chromoting] Tidy up SkISize initialization.

remoting/host/video_frame_capturer_linux.cc

Index: remoting/host/video_frame_capturer_linux.cc
diff --git a/remoting/host/video_frame_capturer_linux.cc b/remoting/host/video_frame_capturer_linux.cc
index 0bcbb4c51cc850e2476a4e7fbac39c168d2dc288..3f4ea939a7e349c99ee5e3a24267a9d849ff0e9f 100644
--- a/remoting/host/video_frame_capturer_linux.cc
+++ b/remoting/host/video_frame_capturer_linux.cc
@@ -37,8 +37,10 @@ static bool ShouldUseXDamage() {
 // A class representing a full-frame pixel buffer
 class VideoFrameBuffer {
  public:
-  VideoFrameBuffer() : bytes_per_row_(0), needs_update_(true) {
-    size_.set(0, 0);
+  VideoFrameBuffer()
+      : size_(SkISize::Make(0, 0)),
+        bytes_per_row_(0),
+        needs_update_(true) {
   }
 
   void Update(Display* display, Window root_window) {