Remove willReadDst from GrFragmentProcessor.

Since only XP's can read dst now, there is no reason to have this query on GrFP.
This also triggered a chain reaction of cleaning up/removing unnecessary code
elsewhere.

BUG=skia:

Review URL: https://codereview.chromium.org/851143003

1 files changed, 1 insertions, 6 deletions

diff --git a/tests/GLProgramsTest.cpp b/tests/GLProgramsTest.cpp
index 70b95e003d..0a28ba2feb 100644
--- a/tests/GLProgramsTest.cpp
+++ b/tests/GLProgramsTest.cpp
@@ -157,11 +157,6 @@ static void set_random_color_coverage_stages(GrGLGpu* gpu,
                                                                          dummyTextures));
         SkASSERT(fp);
 
-        // don't add dst color reads to coverage stage
-        if (s >= numColorProcs && fp->willReadDstColor()) {
-            continue;
-        }
-
         // If adding this effect would exceed the max texture coord set count then generate a
         // new random effect.
         if (usePathRendering && gpu->glPathRendering()->texturingMode() ==
@@ -310,7 +305,7 @@ bool GrDrawTarget::programUnitTest(int maxStages) {
         } else {
             primProc = pathProc.get();
         }
-        if (!this->setupDstReadIfNecessary(&ds, primProc, &dstCopy, NULL)) {
+        if (!this->setupDstReadIfNecessary(&ds, &dstCopy, NULL)) {
             SkDebugf("Couldn't setup dst read texture");
             return false;
         }