Introduce InfoBarTabService API.

chrome/browser/plugin_infobar_delegates.cc

Index: chrome/browser/plugin_infobar_delegates.cc
diff --git a/chrome/browser/plugin_infobar_delegates.cc b/chrome/browser/plugin_infobar_delegates.cc
index fba356a9ba332282a2437e068eda09803607a924..211d970176757c30e33cd3689548049b159c3c26 100644
--- a/chrome/browser/plugin_infobar_delegates.cc
+++ b/chrome/browser/plugin_infobar_delegates.cc
@@ -52,13 +52,16 @@ bool PluginInfoBarDelegate::LinkClicked(WindowOpenDisposition disposition) {
       (disposition == CURRENT_TAB) ? NEW_FOREGROUND_TAB : disposition,
       content::PAGE_TRANSITION_LINK,
       false);
-  owner()->web_contents()->OpenURL(params);
+  owner()->GetWebContents()->OpenURL(params);
   return false;
 }
 
 void PluginInfoBarDelegate::LoadBlockedPlugins() {
-  owner()->Send(
-      new ChromeViewMsg_LoadBlockedPlugins(owner()->routing_id(), identifier_));
+  content::WebContents* web_contents = owner()->GetWebContents();
+  if (web_contents) {
+    web_contents->Send(new ChromeViewMsg_LoadBlockedPlugins(
+        web_contents->GetRoutingID(), identifier_));
+  }
 }
 
 gfx::Image* PluginInfoBarDelegate::GetIcon() const {
@@ -126,8 +129,8 @@ bool UnauthorizedPluginInfoBarDelegate::Accept() {
 bool UnauthorizedPluginInfoBarDelegate::Cancel() {
   content::RecordAction(
       UserMetricsAction("BlockedPluginInfobar.AlwaysAllow"));
-  content_settings_->AddExceptionForURL(owner()->web_contents()->GetURL(),
-                                        owner()->web_contents()->GetURL(),
+  content_settings_->AddExceptionForURL(owner()->GetWebContents()->GetURL(),
+                                        owner()->GetWebContents()->GetURL(),
                                         CONTENT_SETTINGS_TYPE_PLUGINS,
                                         std::string(),
                                         CONTENT_SETTING_ALLOW);
@@ -226,7 +229,7 @@ bool OutdatedPluginInfoBarDelegate::Accept() {
     return false;
   }
 
-  content::WebContents* web_contents = owner()->web_contents();
+  content::WebContents* web_contents = owner()->GetWebContents();
   if (installer()->url_for_display()) {
     installer()->OpenDownloadURL(web_contents);
   } else {
@@ -290,7 +293,8 @@ void OutdatedPluginInfoBarDelegate::ReplaceWithInfoBar(
   if (!owner())
     return;
   InfoBarDelegate* delegate = new PluginInstallerInfoBarDelegate(
-      owner(), installer(), base::Closure(), false, message);
+      static_cast<InfoBarTabHelper*>(owner()),
+      installer(), base::Closure(), false, message);
   owner()->ReplaceInfoBar(this, delegate);
 }
 
@@ -373,7 +377,7 @@ bool PluginInstallerInfoBarDelegate::LinkClicked(
       url, Referrer(),
       (disposition == CURRENT_TAB) ? NEW_FOREGROUND_TAB : disposition,
       content::PAGE_TRANSITION_LINK, false);
-  owner()->web_contents()->OpenURL(params);
+  owner()->GetWebContents()->OpenURL(params);
   return false;
 }
 
@@ -414,7 +418,8 @@ void PluginInstallerInfoBarDelegate::ReplaceWithInfoBar(
   if (!owner())
     return;
   InfoBarDelegate* delegate = new PluginInstallerInfoBarDelegate(
-      owner(), installer(), base::Closure(), new_install_, message);
+      static_cast<InfoBarTabHelper*>(owner()),
+      installer(), base::Closure(), new_install_, message);
   owner()->ReplaceInfoBar(this, delegate);
 }
 
@@ -457,7 +462,7 @@ string16 PluginMetroModeInfoBarDelegate::GetButtonLabel(
 }
 
 bool PluginMetroModeInfoBarDelegate::Accept() {
-  content::WebContents* web_contents = owner()->web_contents();
+  content::WebContents* web_contents = owner()->GetWebContents();
   if (!web_contents)
     return false;
   // Note that empty urls are not valid.
@@ -485,7 +490,7 @@ bool PluginMetroModeInfoBarDelegate::LinkClicked(
       url, Referrer(),
       (disposition == CURRENT_TAB) ? NEW_FOREGROUND_TAB : disposition,
       content::PAGE_TRANSITION_LINK, false);
-  owner()->web_contents()->OpenURL(params);
+  owner()->GetWebContents()->OpenURL(params);
   return false;
 }
 #endif  // defined(OS_WIN)