Cleanup namespace usage from animation to exported in platform/

Source/platform/exported/WebScrollbarThemeGeometryNative.cpp

Index: Source/platform/exported/WebScrollbarThemeGeometryNative.cpp
diff --git a/Source/platform/exported/WebScrollbarThemeGeometryNative.cpp b/Source/platform/exported/WebScrollbarThemeGeometryNative.cpp
index 62f8e166f3cbc78d2ab99d42c4bdfe4dc6685c3a..d9df7d27d719181db5abef9a3d521ebcae415b60 100644
--- a/Source/platform/exported/WebScrollbarThemeGeometryNative.cpp
+++ b/Source/platform/exported/WebScrollbarThemeGeometryNative.cpp
@@ -31,16 +31,14 @@
 #include "platform/scroll/ScrollbarTheme.h"
 #include "public/platform/WebScrollbar.h"
 
-using namespace blink;
-
 namespace blink {
 
-PassOwnPtr<blink::WebScrollbarThemeGeometryNative> WebScrollbarThemeGeometryNative::create(blink::ScrollbarTheme* theme)
+PassOwnPtr<WebScrollbarThemeGeometryNative> WebScrollbarThemeGeometryNative::create(ScrollbarTheme* theme)
 {
     return adoptPtr(new WebScrollbarThemeGeometryNative(theme));
 }
 
-WebScrollbarThemeGeometryNative::WebScrollbarThemeGeometryNative(blink::ScrollbarTheme* theme)
+WebScrollbarThemeGeometryNative::WebScrollbarThemeGeometryNative(ScrollbarTheme* theme)
     : m_theme(theme)
 {
 }