Removed unused parameters

I removed unused parameters wherever it was trivial to do so.
Review URL: https://codereview.chromium.org/12772003

git-svn-id: http://skia.googlecode.com/svn/trunk@8103 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/animator/SkDisplayMovie.cpp b/src/animator/SkDisplayMovie.cpp
index f1f82e3..ea832dc 100644
--- a/src/animator/SkDisplayMovie.cpp
+++ b/src/animator/SkDisplayMovie.cpp
@@ -101,7 +101,7 @@
 }
 #endif
 
-bool SkDisplayMovie::enable(SkAnimateMaker& maker) {
+bool SkDisplayMovie::enable(SkAnimateMaker&) {
     if (fDecodedSuccessfully == false)
         return false;
     SkAnimateMaker* movieMaker = fMovie.fMaker;