Remove deprecated TabContentsDelegate::OpenURLFromTab variant

chrome/browser/io_thread.h

Index: chrome/browser/io_thread.h
diff --git a/chrome/browser/io_thread.h b/chrome/browser/io_thread.h
index ccf1c83e80ce6814af8e6f267dd25159f760639a..207257a837077de20cc0c0a1c169976e67c1e0f1 100644
--- a/chrome/browser/io_thread.h
+++ b/chrome/browser/io_thread.h
@@ -47,8 +47,7 @@ class URLSecurityManager;
 }  // namespace net
 
 // Contains state associated with, initialized and cleaned up on, and
-// primarily used on, the IO thread.  Also acts as a convenience
-// accessor to the Thread object for the IO thread.
+// primarily used on, the IO thread.
 class IOThread : public content::BrowserThreadDelegate {
  public:
   struct Globals {
@@ -115,11 +114,6 @@ class IOThread : public content::BrowserThreadDelegate {
   // called on the IO thread.
   void ClearHostCache();
 
-  // Convenience method similar to base::Thread, giving access to the
-  // actual IO thread.
-  // TODO(joi): Remove this in follow-up changes.
-  MessageLoop* message_loop() const;
-
  private:
   // BrowserThreadDelegate implementation, runs on the IO thread.
   // This handles initialization and destruction of state that must