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

Source/core/rendering/RenderListBox.cpp

Index: Source/core/rendering/RenderListBox.cpp
diff --git a/Source/core/rendering/RenderListBox.cpp b/Source/core/rendering/RenderListBox.cpp
index 82c22b919454f18a40c8d1644d0f3cc8155ddb3a..59d5094ab2dc6111a0620b2a3856a25081fec5ea 100644
--- a/Source/core/rendering/RenderListBox.cpp
+++ b/Source/core/rendering/RenderListBox.cpp
@@ -58,8 +58,6 @@
 #include "platform/text/BidiTextRun.h"
 #include <math.h>
 
-using namespace std;
-
 namespace WebCore {
 
 using namespace HTMLNames;
@@ -161,7 +159,7 @@ void RenderListBox::updateFromElement()
                     textRun.setDirection(direction);
                 textRun.disableRoundingHacks();
                 float textWidth = itemFont.width(textRun);
-                width = max(width, textWidth);
+                width = std::max(width, textWidth);
             }
         }
         m_optionsWidth = static_cast<int>(ceilf(width));
@@ -246,13 +244,13 @@ void RenderListBox::computePreferredLogicalWidths()
         computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
 
     if (styleToUse->minWidth().isFixed() && styleToUse->minWidth().value() > 0) {
-        m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->minWidth().value()));
-        m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->minWidth().value()));
+        m_maxPreferredLogicalWidth = std::max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->minWidth().value()));
+        m_minPreferredLogicalWidth = std::max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->minWidth().value()));
     }
 
     if (styleToUse->maxWidth().isFixed()) {
-        m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->maxWidth().value()));
-        m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->maxWidth().value()));
+        m_maxPreferredLogicalWidth = std::min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->maxWidth().value()));
+        m_minPreferredLogicalWidth = std::min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->maxWidth().value()));
     }
 
     LayoutUnit toAdd = borderAndPaddingWidth();
@@ -266,7 +264,7 @@ int RenderListBox::size() const
 {
     int specifiedSize = selectElement()->size();
     if (specifiedSize > 1)
-        return max(minSize, specifiedSize);
+        return std::max(minSize, specifiedSize);
 
     return defaultSize;
 }
@@ -274,7 +272,7 @@ int RenderListBox::size() const
 int RenderListBox::numVisibleItems() const
 {
     // Only count fully visible rows. But don't return 0 even if only part of a row shows.
-    return max<int>(1, (contentHeight() + rowSpacing) / itemHeight());
+    return std::max<int>(1, (contentHeight() + rowSpacing) / itemHeight());
 }
 
 int RenderListBox::numItems() const
@@ -555,7 +553,7 @@ void RenderListBox::panScroll(const IntPoint& panStartMousePosition)
     int yDelta = lastKnownMousePosition.y() - panStartMousePosition.y();
 
     // If the point is too far from the center we limit the speed
-    yDelta = max<int>(min<int>(yDelta, maxSpeed), -maxSpeed);
+    yDelta = std::max<int>(std::min<int>(yDelta, maxSpeed), -maxSpeed);
 
     if (abs(yDelta) < iconRadius) // at the center we let the space for the icon
         return;
@@ -703,7 +701,7 @@ LayoutUnit RenderListBox::scrollWidth() const
 
 LayoutUnit RenderListBox::scrollHeight() const
 {
-    return max(clientHeight(), listHeight());
+    return std::max(clientHeight(), listHeight());
 }
 
 LayoutUnit RenderListBox::scrollLeft() const
@@ -914,7 +912,7 @@ int RenderListBox::lineStep(ScrollbarOrientation) const
 
 int RenderListBox::pageStep(ScrollbarOrientation orientation) const
 {
-    return max(1, numVisibleItems() - 1);
+    return std::max(1, numVisibleItems() - 1);
 }
 
 float RenderListBox::pixelStep(ScrollbarOrientation) const