Rename GrSamplerState to GrEffectStage.

R=robertphillips@google.com
Review URL: https://codereview.appspot.com/6777053

git-svn-id: http://skia.googlecode.com/svn/trunk@6135 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrInOrderDrawBuffer.cpp b/src/gpu/GrInOrderDrawBuffer.cpp
index 2d1a0ef..7384cad 100644
--- a/src/gpu/GrInOrderDrawBuffer.cpp
+++ b/src/gpu/GrInOrderDrawBuffer.cpp
@@ -129,8 +129,8 @@
         GrMatrix combinedMatrix = drawState->getViewMatrix();
         // We go to device space so that matrix changes allow us to concat
         // rect draws. When the caller has provided explicit source rects
-        // then we don't want to modify the sampler matrices. Otherwise
-        // we have to account for the view matrix change in the sampler
+        // then we don't want to modify the stages' matrices. Otherwise
+        // we have to account for the view matrix change in the stage
         // matrices.
         uint32_t explicitCoordMask = 0;
         if (srcRects) {