Replace uses of GR_API by SK_API.

Makefile.old

 # Simple makefile for skia library and test apps
 #
 # This is the handmade Makefile that we *used* to use before changing over
 # to gyp.  Keeping it around for now in case some folks need to use it...
 # but please contact epoger@google.com about anything you're still using in
 # here, so we can provide equivalent functionality in the gyp build.
 
 # setup our defaults
 CC := gcc
 GPP := g++
@@ skipping 15 matching lines @@
 endif
 
 ifeq ($(SKIA_DEBUG),true)
         DEFINES += -DSK_DEBUG -DSK_SUPPORT_UNIT -DGR_DEBUG=1
         CFLAGS += -g
 else
         CFLAGS += -O3
         DEFINES += -DSK_RELEASE -DGR_DEBUG=0
 endif
 
-DEFINES += -DGR_IMPLEMENTATION=1
-
 ifneq ($(SKIA_PDF_SUPPORT),false)
         DEFINES += -DSK_SUPPORT_PDF
         DEFINES += -DSK_ZLIB_INCLUDE="<zlib.h>"
 endif
 
 ifeq ($(SKIA_SHARED),true)
         CFLAGS += -fPIC
         LIBSKIA = out/libskia.so
 else
         LIBSKIA = out/libskia.a
@@ skipping 272 matching lines @@
         @echo "    clean: removes entire out/ directory"
         @echo "    help: this text"
         @echo "Options: (after make, or in bash shell)"
         @echo "    SKIA_DEBUG=true for debug build"
         @echo "    SKIA_SHARED=true for shared-object libskia build"
         @echo "    SKIA_SCALAR=fixed for fixed-point build"
         @echo "    SKIA_BUILD_FOR=mac for mac build (e.g. CG for image decoding)"
         @echo "    SKIA_PDF_SUPPORT=false to disable the pdf generation backend"
         @echo "    SKIA_MESA=true to build with osmesa instead of native GL.
         @echo ""