Move Pickle to base namespace.

content/common/cursors/webcursor_aurax11.cc

Index: content/common/cursors/webcursor_aurax11.cc
diff --git a/content/common/cursors/webcursor_aurax11.cc b/content/common/cursors/webcursor_aurax11.cc
index dbd2b213448d3c292bdae5676677f56aad81bde4..a50a19953f27bc824148ade9f6c2c76c364c8c08 100644
--- a/content/common/cursors/webcursor_aurax11.cc
+++ b/content/common/cursors/webcursor_aurax11.cc
@@ -53,11 +53,11 @@ void WebCursor::InitPlatformData() {
   device_scale_factor_ = 1.f;
 }
 
-bool WebCursor::SerializePlatformData(Pickle* pickle) const {
+bool WebCursor::SerializePlatformData(base::Pickle* pickle) const {
   return true;
 }
 
-bool WebCursor::DeserializePlatformData(PickleIterator* iter) {
+bool WebCursor::DeserializePlatformData(base::PickleIterator* iter) {
   return true;
 }