Fix some win64 warnings.

Review URL: https://codereview.chromium.org/795223002

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gpu/GrProgramDesc.h b/src/gpu/GrProgramDesc.h
index 3d53842e43..5b339613c5 100644
--- a/src/gpu/GrProgramDesc.h
+++ b/src/gpu/GrProgramDesc.h
@@ -35,7 +35,7 @@ public:
     uint32_t getChecksum() const { return *this->atOffset<uint32_t, kChecksumOffset>(); }
 
     GrProgramDesc& operator= (const GrProgramDesc& other) {
-        size_t keyLength = other.keyLength();
+        uint32_t keyLength = other.keyLength();
         fKey.reset(keyLength);
         memcpy(fKey.begin(), other.fKey.begin(), keyLength);
         return *this;