Convert std::wstring encoding names to std::string in a bunch of files.

chrome/browser/automation/automation_provider.h

Index: chrome/browser/automation/automation_provider.h
diff --git a/chrome/browser/automation/automation_provider.h b/chrome/browser/automation/automation_provider.h
index ca2d6112f42c6fc936517266cee48d4e473a2562..6543a2f08ed042a0c0656c03fd8e4032adb62a26 100644
--- a/chrome/browser/automation/automation_provider.h
+++ b/chrome/browser/automation/automation_provider.h
@@ -432,12 +432,12 @@ class AutomationProvider : public base::RefCounted<AutomationProvider>,
                             bool* success);
 
   // Gets the current used encoding name of the page in the specified tab.
-  void GetPageCurrentEncoding(int tab_handle, std::wstring* current_encoding);
+  void GetPageCurrentEncoding(int tab_handle, std::string* current_encoding);
 
   // Uses the specified encoding to override the encoding of the page in the
   // specified tab.
   void OverrideEncoding(int tab_handle,
-                        const std::wstring& encoding_name,
+                        const std::string& encoding_name,
                         bool* success);
 
   void SavePackageShouldPromptUser(bool should_prompt);