Added glBlendEquation to GL interface

http://codereview.appspot.com/6057047/



git-svn-id: http://skia.googlecode.com/svn/trunk@3720 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/gl/GrGLCreateNullInterface.cpp b/src/gpu/gl/GrGLCreateNullInterface.cpp
index 5095079..7fd4d0d 100644
--- a/src/gpu/gl/GrGLCreateNullInterface.cpp
+++ b/src/gpu/gl/GrGLCreateNullInterface.cpp
@@ -18,6 +18,7 @@
 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBlendColor(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha) {}
 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindFragDataLocation(GrGLuint program, GrGLuint colorNumber, const GrGLchar* name) {}
 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBlendFunc(GrGLenum sfactor, GrGLenum dfactor) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBlendEquation(GrGLenum mode) {}
 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBufferData(GrGLenum target, GrGLsizeiptr size, const GrGLvoid* data, GrGLenum usage) {}
 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBufferSubData(GrGLenum target, GrGLintptr offset, GrGLsizeiptr size, const GrGLvoid* data) {}
 GrGLvoid GR_GL_FUNCTION_TYPE nullGLClear(GrGLbitfield mask) {}
@@ -394,6 +395,7 @@
         interface->fBindTexture = nullGLBindTexture;
         interface->fBlendColor = nullGLBlendColor;
         interface->fBlendFunc = nullGLBlendFunc;
+        interface->fBlendEquation = nullGLBlendEquation;
         interface->fBufferData = nullGLBufferData;
         interface->fBufferSubData = nullGLBufferSubData;
         interface->fClear = nullGLClear;