Start cleaning up 64bit Win warnings

https://codereview.chromium.org/27192003/



git-svn-id: http://skia.googlecode.com/svn/trunk@11764 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrResourceCache.cpp b/src/gpu/GrResourceCache.cpp
index 210cbf8..1d0f384 100644
--- a/src/gpu/GrResourceCache.cpp
+++ b/src/gpu/GrResourceCache.cpp
@@ -354,7 +354,7 @@
     // so we don't want to just do a simple loop kicking each
     // entry out. Instead change the budget and purge.
 
-    int savedMaxBytes = fMaxBytes;
+    size_t savedMaxBytes = fMaxBytes;
     int savedMaxCount = fMaxCount;
     fMaxBytes = (size_t) -1;
     fMaxCount = 0;