Move Pickle to base namespace.

content/common/cursors/webcursor_android.cc

Index: content/common/cursors/webcursor_android.cc
diff --git a/content/common/cursors/webcursor_android.cc b/content/common/cursors/webcursor_android.cc
index 6bf15865d50a6b90e3a8be24276e4af98dab7e4c..08be8b29816a85c5f59eeb9e0587de7cf16ba61f 100644
--- a/content/common/cursors/webcursor_android.cc
+++ b/content/common/cursors/webcursor_android.cc
@@ -12,11 +12,11 @@ namespace content {
 void WebCursor::InitPlatformData() {
 }
 
-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;
 }