chrome: Put window_snapshot into chrome namespace.

chrome/browser/ui/window_snapshot/window_snapshot_gtk.cc

Index: chrome/browser/ui/window_snapshot/window_snapshot_gtk.cc
diff --git a/chrome/browser/ui/window_snapshot/window_snapshot_gtk.cc b/chrome/browser/ui/window_snapshot/window_snapshot_gtk.cc
index bacc004ffca3a185924f2c6c957de247f0daf976..dfb3e290d9726686929f2cdf1511448c3522c119 100644
--- a/chrome/browser/ui/window_snapshot/window_snapshot_gtk.cc
+++ b/chrome/browser/ui/window_snapshot/window_snapshot_gtk.cc
@@ -11,10 +11,11 @@
 #include "ui/base/x/x11_util.h"
 #include "ui/gfx/rect.h"
 
-namespace browser {
+namespace {
 
-static cairo_status_t SnapshotCallback(
-    void *closure, const unsigned char *data, unsigned int length) {
+cairo_status_t SnapshotCallback(void* closure,
+                                const unsigned char* data,
+                                unsigned int length) {
   std::vector<unsigned char>* png_representation =
       static_cast<std::vector<unsigned char>*>(closure);
 
@@ -24,6 +25,10 @@ static cairo_status_t SnapshotCallback(
   return CAIRO_STATUS_SUCCESS;
 }
 
+}  // namespace
+
+namespace chrome {
+
 bool GrabWindowSnapshot(gfx::NativeWindow window_handle,
                         std::vector<unsigned char>* png_representation,
                         const gfx::Rect& snapshot_bounds) {
@@ -70,4 +75,4 @@ bool GrabWindowSnapshot(gfx::NativeWindow window_handle,
   return true;
 }
 
-}  // namespace browser
+}  // namespace chrome