Rewrite references to "wtf/" to "platform/wtf/" in //mojo.

mojo/public/tools/bindings/generators/cpp_templates/module.h.tmpl

Index: mojo/public/tools/bindings/generators/cpp_templates/module.h.tmpl
diff --git a/mojo/public/tools/bindings/generators/cpp_templates/module.h.tmpl b/mojo/public/tools/bindings/generators/cpp_templates/module.h.tmpl
index 0ef6b25b252f811d5436f509f79d0c9d940c4762..9cb28d4eac50b9cf82b3c4400b9ccb9f45b06a5d 100644
--- a/mojo/public/tools/bindings/generators/cpp_templates/module.h.tmpl
+++ b/mojo/public/tools/bindings/generators/cpp_templates/module.h.tmpl
@@ -73,9 +73,9 @@ namespace {{variant}} {
 {# hash_util.h includes template specializations that should be present for
    every use of {Inlined}StructPtr. #}
 #include "mojo/public/cpp/bindings/lib/wtf_hash_util.h"
-#include "third_party/WebKit/Source/wtf/HashFunctions.h"
-#include "third_party/WebKit/Source/wtf/Optional.h"
-#include "third_party/WebKit/Source/wtf/text/WTFString.h"
+#include "third_party/WebKit/Source/platform/wtf/HashFunctions.h"
+#include "third_party/WebKit/Source/platform/wtf/Optional.h"
+#include "third_party/WebKit/Source/platform/wtf/text/WTFString.h"
 {%- endif %}
 
 {%- for header in extra_public_headers %}