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

chrome/test/automation/tab_proxy.cc

Index: chrome/test/automation/tab_proxy.cc
diff --git a/chrome/test/automation/tab_proxy.cc b/chrome/test/automation/tab_proxy.cc
index 6a1cb0a4d3cfa565cdbace2e793e9209b4a8c278..85ab3fcc65c0ceef1f997ca0fadcc59bee3a3813 100644
--- a/chrome/test/automation/tab_proxy.cc
+++ b/chrome/test/automation/tab_proxy.cc
@@ -645,7 +645,7 @@ bool TabProxy::WaitForNavigation(int64 last_navigation_time) {
       result == AUTOMATION_MSG_NAVIGATION_AUTH_NEEDED;
 }
 
-bool TabProxy::GetPageCurrentEncoding(std::wstring* encoding) {
+bool TabProxy::GetPageCurrentEncoding(std::string* encoding) {
   if (!is_valid())
     return false;
 
@@ -654,7 +654,7 @@ bool TabProxy::GetPageCurrentEncoding(std::wstring* encoding) {
   return succeeded;
 }
 
-bool TabProxy::OverrideEncoding(const std::wstring& encoding) {
+bool TabProxy::OverrideEncoding(const std::string& encoding) {
   if (!is_valid())
     return false;