Move GrIPoint16 to SkIPoint16 (and remove GrPoint.h)

R=bsalomon@google.com, reed@google.com

Author: robertphillips@google.com

Review URL: https://codereview.chromium.org/309683002
diff --git a/src/gpu/GrRectanizer_skyline.cpp b/src/gpu/GrRectanizer_skyline.cpp
index 200fa83..b759cb2 100755
--- a/src/gpu/GrRectanizer_skyline.cpp
+++ b/src/gpu/GrRectanizer_skyline.cpp
@@ -7,8 +7,9 @@
  */
 
 #include "GrRectanizer_skyline.h"
+#include "SkPoint.h"
 
-bool GrRectanizerSkyline::addRect(int width, int height, GrIPoint16* loc) {
+bool GrRectanizerSkyline::addRect(int width, int height, SkIPoint16* loc) {
     if ((unsigned)width > (unsigned)this->width() ||
         (unsigned)height > (unsigned)this->height()) {
         return false;