add SkLerpXfermode

BUG=
R=bsalomon@google.com

Review URL: https://codereview.chromium.org/15602003

git-svn-id: http://skia.googlecode.com/svn/trunk@9229 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gyp/effects.gypi b/gyp/effects.gypi
index 3eb0d95..1730ffc 100644
--- a/gyp/effects.gypi
+++ b/gyp/effects.gypi
@@ -34,6 +34,7 @@
     '<(skia_src_path)/effects/SkKernel33MaskFilter.cpp',
     '<(skia_src_path)/effects/SkLayerDrawLooper.cpp',
     '<(skia_src_path)/effects/SkLayerRasterizer.cpp',
+    '<(skia_src_path)/effects/SkLerpXfermode.cpp',
     '<(skia_src_path)/effects/SkLightingImageFilter.cpp',
     '<(skia_src_path)/effects/SkMatrixConvolutionImageFilter.cpp',
     '<(skia_src_path)/effects/SkMergeImageFilter.cpp',
@@ -91,6 +92,7 @@
     '<(skia_include_path)/effects/SkKernel33MaskFilter.h',
     '<(skia_include_path)/effects/SkLayerDrawLooper.h',
     '<(skia_include_path)/effects/SkLayerRasterizer.h',
+    '<(skia_include_path)/effects/SkLerpXfermode.h',
     '<(skia_include_path)/effects/SkLightingImageFilter.h',
     '<(skia_include_path)/effects/SkOffsetImageFilter.h',
     '<(skia_include_path)/effects/SkMorphologyImageFilter.h',
diff --git a/gyp/gmslides.gypi b/gyp/gmslides.gypi
index 96c252d..d07820d 100644
--- a/gyp/gmslides.gypi
+++ b/gyp/gmslides.gypi
@@ -49,6 +49,7 @@
     '../gm/hittestpath.cpp',
     '../gm/imageblur.cpp',
     '../gm/imagemagnifier.cpp',
+    '../gm/lerpmode.cpp',
     '../gm/lighting.cpp',
     '../src/image/SkImage_Codec.cpp',
     '../gm/image.cpp',