Refactor: Untangle Mac's ExclusiveAccessContext from BrowserWindow

chrome/browser/ui/exclusive_access/exclusive_access_context.cc

Index: chrome/browser/ui/exclusive_access/exclusive_access_context.cc
diff --git a/chrome/browser/ui/exclusive_access/exclusive_access_context.cc b/chrome/browser/ui/exclusive_access/exclusive_access_context.cc
index 9a626ed6a6a3ce8a23d7bae1cd905baadb645d41..ee2e67539594db428a48d292c98ea91e2098af60 100644
--- a/chrome/browser/ui/exclusive_access/exclusive_access_context.cc
+++ b/chrome/browser/ui/exclusive_access/exclusive_access_context.cc
@@ -7,6 +7,9 @@
 #include "base/logging.h"
 #include "build/build_config.h"
 
+// This file provides default implementations for the ExclusiveAccessContext
+// methods that only some platforms care about.
+
 bool ExclusiveAccessContext::SupportsFullscreenWithToolbar() const {
   return false;
 }
@@ -19,6 +22,10 @@ void ExclusiveAccessContext::ToggleFullscreenToolbar() {
   NOTIMPLEMENTED();
 }
 
+bool ExclusiveAccessContext::IsFullscreenWithToolbar() const {
+  return false;
+}
+
 #if defined(OS_WIN)
 void ExclusiveAccessContext::SetMetroSnapMode(bool enable) {
   NOTIMPLEMENTED();
@@ -28,11 +35,3 @@ bool ExclusiveAccessContext::IsInMetroSnapMode() const {
   return false;
 }
 #endif  // defined(OS_WIN)
-
-void ExclusiveAccessContext::UnhideDownloadShelf() {
-  // NOOP implementation.
-}
-
-void ExclusiveAccessContext::HideDownloadShelf() {
-  // NOOP implementation.
-}