Make GrGLEffect::setData take GrEffectStage rather than GrEffect.

This allows the coord-change matrix to be communicated to setData(). An accessor for this matrix is also added to GrEffectStage.

R=robertphillips@google.com
Review URL: https://codereview.appspot.com/6779057

git-svn-id: http://skia.googlecode.com/svn/branches/gpu_dev@6143 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/gl/GrGLProgram.cpp b/src/gpu/gl/GrGLProgram.cpp
index 5634e2a..324fdc1 100644
--- a/src/gpu/gl/GrGLProgram.cpp
+++ b/src/gpu/gl/GrGLProgram.cpp
@@ -978,7 +978,7 @@
         if (NULL != fEffects[s]) {
             const GrEffectStage& stage = drawState.getStage(s);
             GrAssert(NULL != stage.getEffect());
-            fEffects[s]->setData(fUniformManager, *stage.getEffect());
+            fEffects[s]->setData(fUniformManager, stage);
         }
     }
 }