Cleanup namespace usage in platform/graphics/[filters/* to skia/*] and platform/graphics/[B-D]*

Source/platform/graphics/gpu/Extensions3DUtil.cpp

Index: Source/platform/graphics/gpu/Extensions3DUtil.cpp
diff --git a/Source/platform/graphics/gpu/Extensions3DUtil.cpp b/Source/platform/graphics/gpu/Extensions3DUtil.cpp
index 7acdec3e35d99c5d5554de3f4d0219c0fe09ac0f..3d66b44fa402c6a8b59bbbe0745af7c43cd75795 100644
--- a/Source/platform/graphics/gpu/Extensions3DUtil.cpp
+++ b/Source/platform/graphics/gpu/Extensions3DUtil.cpp
@@ -23,7 +23,7 @@ void splitStringHelper(const String& str, HashSet<String>& set)
 
 } // anonymous namespace
 
-PassOwnPtr<Extensions3DUtil> Extensions3DUtil::create(blink::WebGraphicsContext3D* context)
+PassOwnPtr<Extensions3DUtil> Extensions3DUtil::create(WebGraphicsContext3D* context)
 {
     OwnPtr<Extensions3DUtil> out = adoptPtr(new Extensions3DUtil(context));
     if (!out->initializeExtensions())
@@ -31,7 +31,7 @@ PassOwnPtr<Extensions3DUtil> Extensions3DUtil::create(blink::WebGraphicsContext3
     return out.release();
 }
 
-Extensions3DUtil::Extensions3DUtil(blink::WebGraphicsContext3D* context)
+Extensions3DUtil::Extensions3DUtil(WebGraphicsContext3D* context)
     : m_context(context)
 {
 }