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_pow2.cpp b/src/gpu/GrRectanizer_pow2.cpp
index 5da7e04..2d443ca 100644
--- a/src/gpu/GrRectanizer_pow2.cpp
+++ b/src/gpu/GrRectanizer_pow2.cpp
@@ -8,7 +8,7 @@
 
 #include "GrRectanizer_pow2.h"
 
-bool GrRectanizerPow2::addRect(int width, int height, GrIPoint16* loc) {
+bool GrRectanizerPow2::addRect(int width, int height, SkIPoint16* loc) {
     if ((unsigned)width > (unsigned)this->width() ||
         (unsigned)height > (unsigned)this->height()) {
         return false;