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/ios/GrGLDefaultInterface_iOS.cpp b/src/gpu/ios/GrGLDefaultInterface_iOS.cpp
index 9fc953f..8923f6e 100644
--- a/src/gpu/ios/GrGLDefaultInterface_iOS.cpp
+++ b/src/gpu/ios/GrGLDefaultInterface_iOS.cpp
@@ -24,6 +24,7 @@
         interface->fBindBuffer = glBindBuffer;
         interface->fBindTexture = glBindTexture;
         interface->fBlendColor = glBlendColor;
+        interface->fBlendEquation = glBlendEquation;
         interface->fBlendFunc = glBlendFunc;
         interface->fBufferData = (GrGLBufferDataProc)glBufferData;
         interface->fBufferSubData = (GrGLBufferSubDataProc)glBufferSubData;