Remove EPM:all_hosts_ and use all_extension_views_ instead.

chrome/browser/automation/automation_util.h

Index: chrome/browser/automation/automation_util.h
diff --git a/chrome/browser/automation/automation_util.h b/chrome/browser/automation/automation_util.h
index 3ebd640c15c059bd3fbd25c035bec84e8f826b02..ef98a46460203c94ea053e8dfe1824a8f060b993 100644
--- a/chrome/browser/automation/automation_util.h
+++ b/chrome/browser/automation/automation_util.h
@@ -14,7 +14,6 @@ class AutomationId;
 class AutomationProvider;
 class Browser;
 class Extension;
-class ExtensionHost;
 class GURL;
 class Profile;
 class TabContentsWrapper;
@@ -92,8 +91,9 @@ bool SendErrorIfModalDialogActive(AutomationProvider* provider,
 // Returns a valid automation ID for the given tab.
 AutomationId GetIdForTab(const TabContentsWrapper* tab);
 
-// Returns a valid automation ID for the extension host.
-AutomationId GetIdForExtensionView(const ExtensionHost* ext_host);
+// Returns a valid automation ID for the extension view.
+AutomationId GetIdForExtensionView(
+    const content::RenderViewHost* render_view_host);
 
 // Returns a valid automation ID for the extension.
 AutomationId GetIdForExtension(const Extension* extension);