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

Seems to have quite a few warnings in 64-bit on my machine.

BUG=angleproject:1120

This reverts commit c5cf9bc47d0ee028adbbf9e9f94ca567eec601dc.

Change-Id: I86768b900aeba52e7a2242d9ae8949f93f1a5ba9
Reviewed-on: https://chromium-review.googlesource.com/293280
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/compiler/translator/VariableInfo.cpp b/src/compiler/translator/VariableInfo.cpp
index 8e1c008..d61dc40 100644
--- a/src/compiler/translator/VariableInfo.cpp
+++ b/src/compiler/translator/VariableInfo.cpp
@@ -55,8 +55,7 @@
     {
         if (variable.isArray())
         {
-            for (unsigned int elementIndex = 0; elementIndex < variable.elementCount();
-                 elementIndex++)
+            for (size_t elementIndex = 0; elementIndex < variable.elementCount(); elementIndex++)
             {
                 std::string lname = name + ::ArrayString(elementIndex);
                 std::string lmappedName = mappedName + ::ArrayString(elementIndex);