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

Source/core/rendering/RenderLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 73 matching lines @@
 #include "platform/graphics/GraphicsContextStateSaver.h"
 #include "platform/graphics/filters/ReferenceFilter.h"
 #include "platform/graphics/filters/SourceGraphic.h"
 #include "platform/transforms/ScaleTransformOperation.h"
 #include "platform/transforms/TransformationMatrix.h"
 #include "platform/transforms/TranslateTransformOperation.h"
 #include "public/platform/Platform.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/text/CString.h"
 
-using namespace std;
-
 namespace WebCore {
 
 namespace {
 
 static CompositingQueryMode gCompositingQueryMode =
     CompositingQueriesAreOnlyAllowedInCertainDocumentLifecyclePhases;
 
 } // namespace
 
 using namespace HTMLNames;
@@ skipping 2653 matching lines @@
     RefPtr<HitTestingTransformState> unflattenedTransformState = localTransformState;
     if (localTransformState && !preserves3D()) {
         // Keep a copy of the pre-flattening state, for computing z-offsets for the container
         unflattenedTransformState = HitTestingTransformState::create(*localTransformState);
         // This layer is flattening, so flatten the state passed to descendants.
         localTransformState->flatten();
     }
 
     // The following are used for keeping track of the z-depth of the hit point of 3d-transformed
     // descendants.
-    double localZOffset = -numeric_limits<double>::infinity();
+    double localZOffset = -std::numeric_limits<double>::infinity();
     double* zOffsetForDescendantsPtr = 0;
     double* zOffsetForContentsPtr = 0;
 
     bool depthSortDescendants = false;
     if (preserves3D()) {
         depthSortDescendants = true;
         // Our layers can depth-test with our container, so share the z depth pointer with the container, if it passed one down.
         zOffsetForDescendantsPtr = zOffset ? zOffset : &localZOffset;
         zOffsetForContentsPtr = zOffset ? zOffset : &localZOffset;
     } else if (m_has3DTransformedDescendant) {
@@ skipping 1070 matching lines @@
     }
 }
 
 void showLayerTree(const WebCore::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif