Removing "using" declarations that import names in the C++ Standard library.

Source/core/inspector/ContentSearchUtils.cpp

Index: Source/core/inspector/ContentSearchUtils.cpp
diff --git a/Source/core/inspector/ContentSearchUtils.cpp b/Source/core/inspector/ContentSearchUtils.cpp
index 473968b02467f180f0687fd24ce17f7a47eceae6..d025b5ea302b4c5bb4c887bdaff554d317c83a71 100644
--- a/Source/core/inspector/ContentSearchUtils.cpp
+++ b/Source/core/inspector/ContentSearchUtils.cpp
@@ -33,8 +33,6 @@
 #include "bindings/v8/ScriptRegexp.h"
 #include "wtf/text/StringBuilder.h"
 
-using namespace std;
-
 namespace WebCore {
 namespace ContentSearchUtils {
 
@@ -117,9 +115,9 @@ static String findMagicComment(const String& content, const String& name, MagicC
     unsigned length = content.length();
     unsigned nameLength = name.length();
 
-    size_t pos = length;
-    size_t equalSignPos = 0;
-    size_t closingCommentPos = 0;
+    std::size_t pos = length;
+    std::size_t equalSignPos = 0;
+    std::size_t closingCommentPos = 0;
     while (true) {
         pos = content.reverseFind(name, pos);
         if (pos == kNotFound)
@@ -155,12 +153,12 @@ static String findMagicComment(const String& content, const String& name, MagicC
 
     ASSERT(equalSignPos);
     ASSERT(commentType != CSSMagicComment || closingCommentPos);
-    size_t urlPos = equalSignPos + 1;
+    std::size_t urlPos = equalSignPos + 1;
     String match = commentType == CSSMagicComment
         ? content.substring(urlPos, closingCommentPos - urlPos)
         : content.substring(urlPos);
 
-    size_t newLine = match.find("\n");
+    std::size_t newLine = match.find("\n");
     if (newLine != kNotFound)
         match = match.substring(0, newLine);
     match = match.stripWhiteSpace();