[Mac] Add cocoa implementation for sidebar extension action support

chrome/browser/ui/cocoa/browser_window_controller.mm

Index: chrome/browser/ui/cocoa/browser_window_controller.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_controller.mm b/chrome/browser/ui/cocoa/browser_window_controller.mm
index c4205301f799e87d52ba2ceacf4e8451191d9afc..d27cb4a0fc98c3c1c4ef0fb9c3a18cd588c026ef 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.mm
+++ b/chrome/browser/ui/cocoa/browser_window_controller.mm
@@ -61,6 +61,7 @@
 #import "chrome/browser/ui/cocoa/profiles/avatar_base_controller.h"
 #import "chrome/browser/ui/cocoa/profiles/avatar_button_controller.h"
 #import "chrome/browser/ui/cocoa/profiles/avatar_icon_controller.h"
+#import "chrome/browser/ui/cocoa/sidebar_controller.h"
 #import "chrome/browser/ui/cocoa/status_bubble_mac.h"
 #import "chrome/browser/ui/cocoa/tab_contents/overlayable_contents_controller.h"
 #import "chrome/browser/ui/cocoa/tab_contents/tab_contents_controller.h"
@@ -313,6 +314,12 @@ using content::WebContents;
     [[devToolsController_ view]
         addSubview:[overlayableContentsController_ view]];
 
+    // Create a sub-controller for the docked sidebar and add its view to the
+    // hierarchy.
+    sidebarController_.reset([[SidebarController alloc]
+        initWithParentViewController:devToolsController_
+               andContentsController:overlayableContentsController_]);
+
     // Create a controller for the tab strip, giving it the model object for
     // this window's Browser and the tab strip view. The controller will handle
     // registering for the appropriate tab notifications from the back-end and
@@ -557,6 +564,14 @@ using content::WebContents;
     [self layoutSubviews];
 }
 
+
+- (void)updateSidebarForContents:(content::WebContents*)tab_contents
+                sidebar_contents:(content::WebContents*)sidebar_contents {
+  [sidebarController_ updateSidebarForTabContents:tab_contents
+                                 sidebar_contents:sidebar_contents];
+  [sidebarController_ ensureContentsVisible];
+}
+
 // Called when the user wants to close a window or from the shutdown process.
 // The Browser object is in control of whether or not we're allowed to close. It
 // may defer closing due to several states, such as onUnload handlers needing to
@@ -1487,6 +1502,9 @@ using content::WebContents;
   // Update all the UI bits.
   windowShim_->UpdateTitleBar();
 
+  [sidebarController_
+      updateSidebarForTabContents:static_cast<content::WebContents*>(contents)
+      sidebar_contents:[sidebarController_ currentSidebarContents]];
   // Update the bookmark bar.
   // TODO(viettrungluu): perhaps update to not terminate running animations (if
   // applicable)?
@@ -1495,6 +1513,9 @@ using content::WebContents;
 
   [infoBarContainerController_ changeWebContents:contents];
 
+  // Update devTools and sidebar contents after size for all views is set.
+  [sidebarController_ ensureContentsVisible];
+
   // Must do this after bookmark and infobar updates to avoid
   // unnecesary resize in contents.
   [devToolsController_ updateDevToolsForWebContents:contents