Remove some unneeded reinterpret_casts

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/7741018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@98417 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/base/string16.cc b/base/string16.cc
index 6fc38ce..a801610 100644
--- a/base/string16.cc
+++ b/base/string16.cc
@@ -51,11 +51,11 @@
 }
 
 char16* c16memmove(char16* s1, const char16* s2, size_t n) {
-  return reinterpret_cast<char16*>(memmove(s1, s2, n * sizeof(char16)));
+  return static_cast<char16*>(memmove(s1, s2, n * sizeof(char16)));
 }
 
 char16* c16memcpy(char16* s1, const char16* s2, size_t n) {
-  return reinterpret_cast<char16*>(memcpy(s1, s2, n * sizeof(char16)));
+  return static_cast<char16*>(memcpy(s1, s2, n * sizeof(char16)));
 }
 
 char16* c16memset(char16* s, char16 c, size_t n) {