Fixed compiler warning C4267 'conversion from 'size_t' to 'type', possible loss of data'

BUG=angleproject:1120

Change-Id: I01ef10bea7f487c2b394d030c76628f38d2ea645
Reviewed-on: https://chromium-review.googlesource.com/292780
Tested-by: Cooper Partin <coopp@microsoft.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/compiler/translator/IntermNode.cpp b/src/compiler/translator/IntermNode.cpp
index a4a6f70..1d26947 100644
--- a/src/compiler/translator/IntermNode.cpp
+++ b/src/compiler/translator/IntermNode.cpp
@@ -1875,7 +1875,7 @@
 {
     TOperator op = aggregate->getOp();
     TIntermSequence *sequence = aggregate->getSequence();
-    unsigned int paramsCount = sequence->size();
+    unsigned int paramsCount = static_cast<unsigned int>(sequence->size());
     std::vector<TConstantUnion *> unionArrays(paramsCount);
     std::vector<size_t> objectSizes(paramsCount);
     size_t maxObjectSize = 0;
@@ -2256,7 +2256,7 @@
             {
                 // Perform component-wise matrix multiplication.
                 resultArray = new TConstantUnion[maxObjectSize];
-                size_t size = (*sequence)[0]->getAsTyped()->getNominalSize();
+                int size = (*sequence)[0]->getAsTyped()->getNominalSize();
                 angle::Matrix<float> result =
                     GetMatrix(unionArrays[0], size).compMult(GetMatrix(unionArrays[1], size));
                 SetUnionArrayFromMatrix(result, resultArray);
@@ -2272,7 +2272,8 @@
                 size_t numCols = (*sequence)[1]->getAsTyped()->getType().getObjectSize();
                 resultArray = new TConstantUnion[numRows * numCols];
                 angle::Matrix<float> result =
-                    GetMatrix(unionArrays[0], 1, numCols).outerProduct(GetMatrix(unionArrays[1], numRows, 1));
+                    GetMatrix(unionArrays[0], 1, static_cast<int>(numCols))
+                        .outerProduct(GetMatrix(unionArrays[1], static_cast<int>(numRows), 1));
                 SetUnionArrayFromMatrix(result, resultArray);
             }
             else