Forbid content translate driver from initiating translation for page forward/back.

components/translate/content/browser/content_translate_driver.cc

Index: components/translate/content/browser/content_translate_driver.cc
diff --git a/components/translate/content/browser/content_translate_driver.cc b/components/translate/content/browser/content_translate_driver.cc
index 54a862d50326738eb215d07460a05097fdaf6a0e..ed585f34763980a557a19181f39a3db5167b7689 100644
--- a/components/translate/content/browser/content_translate_driver.cc
+++ b/components/translate/content/browser/content_translate_driver.cc
@@ -189,6 +189,13 @@ void ContentTranslateDriver::NavigationEntryCommitted(
     return;
   }
 
+  if (entry->GetTransitionType() & ui::PAGE_TRANSITION_FORWARD_BACK) {
+    // Workaround for http://crbug.com/653051: back navigation sometimes have
+    // the reload core type. Once http://crbug.com/669008 got resolved, we
+    // could revisit here for a thorough solution.
+    return;
+  }
+
   if (!translate_manager_->GetLanguageState().page_needs_translation())
     return;