fix size_t/int warnings

src/animator/SkScriptTokenizer.cpp

Index: src/animator/SkScriptTokenizer.cpp
diff --git a/src/animator/SkScriptTokenizer.cpp b/src/animator/SkScriptTokenizer.cpp
index 8fc5d802cb1b5acac67fb828f11b184fc5dbcfc4..03ffaa4a721bd195251ba5fc07b2e5bf6e376a6f 100644
--- a/src/animator/SkScriptTokenizer.cpp
+++ b/src/animator/SkScriptTokenizer.cpp
@@ -170,7 +170,7 @@ void SkScriptEngine2::addTokenScalar(SkScalar scalar) {
 }
 
 void SkScriptEngine2::addTokenString(const SkString& string) {
-    int size = string.size();
+    int size = SkToInt(string.size());
     addTokenInt(size);
     fActiveStream->write(string.c_str(), size);
 }
@@ -1023,7 +1023,7 @@ void SkScriptEngine2::processLogicalOp(Op op) {
             branch.fOperator = op;
             branch.fDone = Branch::kIsNotDone;
             SkASSERT(branch.fOpStackDepth == fOpStack.count());
-            branch.fOffset = newOffset;
+            branch.fOffset = SkToU16(newOffset);
             fAccumulatorType = SkOperand2::kNoType;
         } break;
         case kLogicalAnd: