[blink]: Annotate StringImpl::createStatic leak for LeakSanitizer.

Source/wtf/text/StringImpl.cpp

Index: Source/wtf/text/StringImpl.cpp
diff --git a/Source/wtf/text/StringImpl.cpp b/Source/wtf/text/StringImpl.cpp
index f4ff9a4053596360ca71dbc563f29ff5117c5d23..a3bf6e1ce3ca044b4313c4424cb1db85655a10f6 100644
--- a/Source/wtf/text/StringImpl.cpp
+++ b/Source/wtf/text/StringImpl.cpp
@@ -25,6 +25,7 @@
 #include "config.h"
 #include "wtf/text/StringImpl.h"
 
+#include "wtf/LeakAnnotations.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/text/AtomicString.h"
 #include "wtf/text/StringBuffer.h"
@@ -345,11 +346,14 @@ StringImpl* StringImpl::createStatic(const char* string, unsigned length, unsign
     // heap allocation from this call.
     RELEASE_ASSERT(length <= ((std::numeric_limits<unsigned>::max() - sizeof(StringImpl)) / sizeof(LChar)));
     size_t size = sizeof(StringImpl) + length * sizeof(LChar);
-    StringImpl* impl = static_cast<StringImpl*>(fastMalloc(size));
-
-    LChar* data = reinterpret_cast<LChar*>(impl + 1);
-    impl = new (NotNull, impl) StringImpl(length, hash, StaticString);
-    memcpy(data, string, length * sizeof(LChar));
+    StringImpl* impl;
+    {
+        WTF_ANNOTATE_SCOPED_MEMORY_LEAK;
+        impl = static_cast<StringImpl*>(fastMalloc(size));
+        LChar* data = reinterpret_cast<LChar*>(impl + 1);
+        impl = new (NotNull, impl) StringImpl(length, hash, StaticString);
+        memcpy(data, string, length * sizeof(LChar));
+    }
 #ifndef NDEBUG
     impl->assertHashIsCorrect();
 #endif