Add the onBeforeNavigate and onErrorOccured events to the webNavigation API.

chrome/browser/tab_contents/provisional_load_details.h

Index: chrome/browser/tab_contents/provisional_load_details.h
diff --git a/chrome/browser/tab_contents/provisional_load_details.h b/chrome/browser/tab_contents/provisional_load_details.h
index 92ac9b1405e2b54756c5f23c7ab00da7286652c1..2073db0573f5497f44fa06c198bc1839eadb8c19 100644
--- a/chrome/browser/tab_contents/provisional_load_details.h
+++ b/chrome/browser/tab_contents/provisional_load_details.h
@@ -9,6 +9,7 @@
 #include <string>
 
 #include "base/basictypes.h"
+#include "chrome/common/page_transition_types.h"
 #include "googleurl/src/gurl.h"
 
 // This class captures some of the information associated to the provisional
@@ -32,6 +33,13 @@ class ProvisionalLoadDetails {
   void set_error_code(int error_code) { error_code_ = error_code; }
   int error_code() const { return error_code_; }
 
+  void set_transition_type(PageTransition::Type transition_type) {
+    transition_type_ = transition_type;
+  }
+  PageTransition::Type transition_type() const {
+    return transition_type_;
+  }
+
   const GURL& url() const { return url_; }
 
   bool main_frame() const { return is_main_frame_; }
@@ -50,6 +58,7 @@ class ProvisionalLoadDetails {
 
  private:
   int error_code_;
+  PageTransition::Type transition_type_;
   GURL url_;
   bool is_main_frame_;
   bool is_in_page_navigation_;