Start to propagate constness of GrPipelineBuilder up the stack

src/gpu/GrSoftwarePathRenderer.cpp

Index: src/gpu/GrSoftwarePathRenderer.cpp
diff --git a/src/gpu/GrSoftwarePathRenderer.cpp b/src/gpu/GrSoftwarePathRenderer.cpp
index 3d5bc3e6561be7dc2e5f390763a27d7697e26bd1..5389a9bcb6b21921d6b7d0183567567d3910c341 100644
--- a/src/gpu/GrSoftwarePathRenderer.cpp
+++ b/src/gpu/GrSoftwarePathRenderer.cpp
@@ -94,22 +94,22 @@ void draw_around_inv_path(GrDrawTarget* target,
     if (devClipBounds.fTop < devPathBounds.fTop) {
         rect.iset(devClipBounds.fLeft, devClipBounds.fTop,
                   devClipBounds.fRight, devPathBounds.fTop);
-        target->drawBWRect(pipelineBuilder, color, SkMatrix::I(), rect, NULL, &invert);
+        target->drawBWRect(*pipelineBuilder, color, SkMatrix::I(), rect, NULL, &invert);
     }
     if (devClipBounds.fLeft < devPathBounds.fLeft) {
         rect.iset(devClipBounds.fLeft, devPathBounds.fTop,
                   devPathBounds.fLeft, devPathBounds.fBottom);
-        target->drawBWRect(pipelineBuilder, color, SkMatrix::I(), rect, NULL, &invert);
+        target->drawBWRect(*pipelineBuilder, color, SkMatrix::I(), rect, NULL, &invert);
     }
     if (devClipBounds.fRight > devPathBounds.fRight) {
         rect.iset(devPathBounds.fRight, devPathBounds.fTop,
                   devClipBounds.fRight, devPathBounds.fBottom);
-        target->drawBWRect(pipelineBuilder, color, SkMatrix::I(), rect, NULL, &invert);
+        target->drawBWRect(*pipelineBuilder, color, SkMatrix::I(), rect, NULL, &invert);
     }
     if (devClipBounds.fBottom > devPathBounds.fBottom) {
         rect.iset(devClipBounds.fLeft, devPathBounds.fBottom,
                   devClipBounds.fRight, devClipBounds.fBottom);
-        target->drawBWRect(pipelineBuilder, color, SkMatrix::I(), rect, NULL, &invert);
+        target->drawBWRect(*pipelineBuilder, color, SkMatrix::I(), rect, NULL, &invert);
     }
 }