Update to Chromium revision 8cb76f56 (#307671)

- Linux/Mac: Load V8 initial snapshot from external bin files (see http://crbug.com/421063).
- Windows: 8.1 SDK is now required (issue #1470).
- Remove CefDOMDocument::GetSelectionStartNode and GetSelectionEndNode methods(see https://codereview.chromium.org/763043004).
- Rename internal namespace used in base headers to avoid linker conflicts with cef_sandbox.lib.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1956 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

include/base/internal/cef_lock_impl.h

@@ -43,7 +43,7 @@
 #include "include/base/cef_macros.h"
 
 namespace base {
-namespace internal {
+namespace cef_internal {
 
 // This class implements the underlying platform-specific spin-lock mechanism
 // used for the Lock class.  Most users should not use LockImpl directly, but
@@ -81,7 +81,7 @@ class LockImpl {
   DISALLOW_COPY_AND_ASSIGN(LockImpl);
 };
 
-}  // namespace internal
+}  // namespace cef_internal
 }  // namespace base
 
 #endif  // CEF_INCLUDE_BASE_INTERNAL_CEF_LOCK_IMPL_H_