Tests : Unused parameters cleanup

I removed unused parameters in the tests wherever it was trivial to do so. I'm trying to get the easy ones out of the way before we get into more involved discussions around this.
Review URL: https://codereview.appspot.com/7394055

git-svn-id: http://skia.googlecode.com/svn/trunk@7891 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/CanvasTest.cpp b/tests/CanvasTest.cpp
index 8c64d58..006c855 100644
--- a/tests/CanvasTest.cpp
+++ b/tests/CanvasTest.cpp
@@ -430,8 +430,8 @@
 TEST_STEP(PaintSaveLayer, PaintSaveLayerStep);
 
 static void TwoClipOpsStep(SkCanvas* canvas,
-                           skiatest::Reporter* reporter,
-                           CanvasTestStep* testStep) {
+                           skiatest::Reporter*,
+                           CanvasTestStep*) {
     // This test exercises a functionality in SkPicture that leads to the
     // recording of restore offset placeholders.  This test will trigger an
     // assertion at playback time if the placeholders are not properly
@@ -444,8 +444,8 @@
 // exercise fix for http://code.google.com/p/skia/issues/detail?id=560
 // ('SkPathStroker::lineTo() fails for line with length SK_ScalarNearlyZero')
 static void DrawNearlyZeroLengthPathTestStep(SkCanvas* canvas,
-                                             skiatest::Reporter* reporter,
-                                             CanvasTestStep* testStep) {
+                                             skiatest::Reporter*,
+                                             CanvasTestStep*) {
     SkPaint paint;
     paint.setStrokeWidth(SkIntToScalar(1));
     paint.setStyle(SkPaint::kStroke_Style);
@@ -465,8 +465,8 @@
 TEST_STEP(DrawNearlyZeroLengthPath, DrawNearlyZeroLengthPathTestStep);
 
 static void DrawVerticesShaderTestStep(SkCanvas* canvas,
-                                       skiatest::Reporter* reporter,
-                                       CanvasTestStep* testStep) {
+                                       skiatest::Reporter*,
+                                       CanvasTestStep*) {
     SkPoint pts[4];
     pts[0].set(0, 0);
     pts[1].set(SkIntToScalar(kWidth), 0);
@@ -483,8 +483,8 @@
 TEST_STEP_NO_PDF(DrawVerticesShader, DrawVerticesShaderTestStep);
 
 static void DrawPictureTestStep(SkCanvas* canvas,
-                                skiatest::Reporter* reporter,
-                                CanvasTestStep* testStep) {
+                                skiatest::Reporter*,
+                                CanvasTestStep*) {
     SkPicture* testPicture = SkNEW_ARGS(SkPicture, ());
     SkAutoUnref aup(testPicture);
     SkCanvas* testCanvas = testPicture->beginRecording(kWidth, kHeight);
@@ -553,8 +553,8 @@
 TEST_STEP(DrawLayer, DrawLayerTestStep);
 
 static void NestedSaveRestoreWithSolidPaintTestStep(SkCanvas* canvas,
-                                      skiatest::Reporter* reporter,
-                                      CanvasTestStep* testStep) {
+                                      skiatest::Reporter*,
+                                      CanvasTestStep*) {
     // This test step challenges the TestDeferredCanvasStateConsistency
     // test cases because the opaque paint can trigger an optimization
     // that discards previously recorded commands. The challenge is to maintain
@@ -575,8 +575,8 @@
     NestedSaveRestoreWithSolidPaintTestStep);
 
 static void NestedSaveRestoreWithFlushTestStep(SkCanvas* canvas,
-                                      skiatest::Reporter* reporter,
-                                      CanvasTestStep* testStep) {
+                                      skiatest::Reporter*,
+                                      CanvasTestStep*) {
     // This test step challenges the TestDeferredCanvasStateConsistency
     // test case because the canvas flush on a deferred canvas will
     // reset the recording session. The challenge is to maintain correct