Use C++11 features in core/html

Source/core/html/HTMLDocument.cpp

Index: Source/core/html/HTMLDocument.cpp
diff --git a/Source/core/html/HTMLDocument.cpp b/Source/core/html/HTMLDocument.cpp
index 3183f5b286d5e5fcbce6e2c990e75f785055b43d..230b015db129529e7cf6dbdcb106aba291afd3ee 100644
--- a/Source/core/html/HTMLDocument.cpp
+++ b/Source/core/html/HTMLDocument.cpp
@@ -275,8 +275,8 @@ void HTMLDocument::write(LocalDOMWindow* callingWindow, const Vector<String>& te
 {
     ASSERT(callingWindow);
     StringBuilder builder;
-    for (size_t i = 0; i < text.size(); ++i)
-        builder.append(text[i]);
+    for (const String& string : text)
+        builder.append(string);
     write(builder.toString(), callingWindow->document(), exceptionState);
 }
 
@@ -284,8 +284,8 @@ void HTMLDocument::writeln(LocalDOMWindow* callingWindow, const Vector<String>&
 {
     ASSERT(callingWindow);
     StringBuilder builder;
-    for (size_t i = 0; i < text.size(); ++i)
-        builder.append(text[i]);
+    for (const String& string : text)
+        builder.append(string);
     writeln(builder.toString(), callingWindow->document(), exceptionState);
 }