Roll Skia DEPS to 3754; add recent source files to skia.gyp.

skia/skia.gyp

Index: skia/skia.gyp
===================================================================
--- skia/skia.gyp	(revision 133468)
+++ skia/skia.gyp	(working copy)
@@ -366,6 +366,7 @@
         '../third_party/skia/src/gpu/GrClipMaskManager.cpp',
         '../third_party/skia/src/gpu/GrClipMaskManager.h',
         '../third_party/skia/src/gpu/GrContext.cpp',
+        '../third_party/skia/src/gpu/GrCustomStage.cpp',
         '../third_party/skia/src/gpu/GrDefaultPathRenderer.cpp',
         '../third_party/skia/src/gpu/GrDefaultPathRenderer.h',
         '../third_party/skia/src/gpu/GrDefaultTextContext.cpp',
@@ -427,6 +428,8 @@
         '../third_party/skia/src/gpu/gl/GrGLInterface.cpp',
         '../third_party/skia/src/gpu/gl/GrGLProgram.cpp',
         '../third_party/skia/src/gpu/gl/GrGLProgram.h',
+        '../third_party/skia/src/gpu/gl/GrGLProgramStage.cpp',
+        '../third_party/skia/src/gpu/gl/GrGLProgramStage.h',
         '../third_party/skia/src/gpu/gl/GrGLRenderTarget.cpp',
         '../third_party/skia/src/gpu/gl/GrGLRenderTarget.h',
         '../third_party/skia/src/gpu/gl/GrGLSL.cpp',
@@ -646,6 +649,7 @@
         '../third_party/skia/include/gpu/GrColor.h',
         '../third_party/skia/include/gpu/GrConfig.h',
         '../third_party/skia/include/gpu/GrContext.h',
+        '../third_party/skia/include/gpu/GrCustomStage.h',
         '../third_party/skia/include/gpu/GrFontScaler.h',
         '../third_party/skia/include/gpu/gl/GrGLConfig.h',
         '../third_party/skia/include/gpu/gl/GrGLConfig_chrome.h',