Removed unused parameters

I removed unused parameters wherever it was trivial to do so.
Review URL: https://codereview.chromium.org/12469002

git-svn-id: http://skia.googlecode.com/svn/trunk@8068 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/GradientTest.cpp b/tests/GradientTest.cpp
index 41724b6..cf8fbee 100644
--- a/tests/GradientTest.cpp
+++ b/tests/GradientTest.cpp
@@ -42,7 +42,7 @@
 };
 
 
-static void none_gradproc(skiatest::Reporter* reporter, const GradRec& rec) {
+static void none_gradproc(skiatest::Reporter* reporter, const GradRec&) {
     SkAutoTUnref<SkShader> s(new SkEmptyShader);
     REPORTER_ASSERT(reporter, SkShader::kNone_GradientType == s->asAGradient(NULL));
 }
@@ -129,7 +129,7 @@
 }
 
 // Ensure that repeated color gradients behave like drawing a single color
-static void TestConstantGradient(skiatest::Reporter* reporter) {
+static void TestConstantGradient(skiatest::Reporter*) {
     const SkPoint pts[] = {
         { 0, 0 },
         { SkIntToScalar(10), 0 }