Remove 'String::append' from some of the blink source.

Source/core/fetch/CSSStyleSheetResource.cpp

Index: Source/core/fetch/CSSStyleSheetResource.cpp
diff --git a/Source/core/fetch/CSSStyleSheetResource.cpp b/Source/core/fetch/CSSStyleSheetResource.cpp
old mode 100644
new mode 100755
index 7952ec5da2ec71af331f574e7073183978add410..49284b62069722a11e51acc6a46e756f959bbfbe
--- a/Source/core/fetch/CSSStyleSheetResource.cpp
+++ b/Source/core/fetch/CSSStyleSheetResource.cpp
@@ -35,6 +35,7 @@
 #include "platform/network/HTTPParsers.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/Vector.h"
+#include "wtf/text/StringBuilder.h"
 
 namespace WebCore {
 
@@ -88,9 +89,10 @@ const String CSSStyleSheetResource::sheetText(bool enforceMIMEType, bool* hasVal
         return m_decodedSheetText;
 
     // Don't cache the decoded text, regenerating is cheap and it can use quite a bit of memory
-    String sheetText = m_decoder->decode(m_data->data(), m_data->size());
+    StringBuilder sheetText;
+    sheetText.append(m_decoder->decode(m_data->data(), m_data->size()));
     sheetText.append(m_decoder->flush());

[gnana, 2014/01/08 16:01:42]

I m not sure if this change adds value. I will be happy if you can give comments
on this.

[abarth-chromium, 2014/01/08 16:35:23]

This isn't great either...  Maybe

String sheetText = m_decoder->decode(m_data->data(), m_data->size());
sheetText = sheetText + m_decoder->flush();

?

I would definitely like to remove String::append from the code base.

[gnana, 2014/01/09 08:06:44]

This looks better. Modified as you suggested.

Done.

-    return sheetText;
+    return sheetText.toString();
 }
 
 void CSSStyleSheetResource::checkNotify()