Introduce String::fromUTF8Lenient() and use it for cache_name in CacheStorage API.

third_party/WebKit/Source/wtf/text/WTFString.h

Index: third_party/WebKit/Source/wtf/text/WTFString.h
diff --git a/third_party/WebKit/Source/wtf/text/WTFString.h b/third_party/WebKit/Source/wtf/text/WTFString.h
index 0b1b4ea8fd153ea6f4baae0726940c95b34a97f1..b1ae55aef1110daf32afb947c8cd94bf6f916ee9 100644
--- a/third_party/WebKit/Source/wtf/text/WTFString.h
+++ b/third_party/WebKit/Source/wtf/text/WTFString.h
@@ -430,7 +430,7 @@ public:
 
     // String::fromUTF8 will return a null string if
     // the input data contains invalid UTF-8 sequences.
-    static String fromUTF8(const LChar*, size_t);
+    static String fromUTF8(const LChar*, size_t, bool strict = true);

[jsbell, 2016/03/08 20:28:15]

Please update the documentation.

[horo, 2016/03/09 01:58:40]

Done.

     static String fromUTF8(const LChar*);
     static String fromUTF8(const char* s, size_t length) { return fromUTF8(reinterpret_cast<const LChar*>(s), length); }
     static String fromUTF8(const char* s) { return fromUTF8(reinterpret_cast<const LChar*>(s)); }
@@ -441,6 +441,9 @@ public:
     static String fromUTF8WithLatin1Fallback(const LChar*, size_t);
     static String fromUTF8WithLatin1Fallback(const char* s, size_t length) { return fromUTF8WithLatin1Fallback(reinterpret_cast<const LChar*>(s), length); }
 
+    static String fromUTF8Lenient(const LChar* s, size_t length)  { return fromUTF8(s, length, false); }

[jsbell, 2016/03/08 20:28:15]

Please add documentation.

[horo, 2016/03/09 01:58:40]

Done.

+    static String fromUTF8Lenient(const char* s, size_t length) { return fromUTF8Lenient(reinterpret_cast<const LChar*>(s), length); }
+
     bool containsOnlyASCII() const;
     bool containsOnlyLatin1() const;
     bool containsOnlyWhitespace() const { return !m_impl || m_impl->containsOnlyWhitespace(); }