Fix a bunch of clang warnings/errors.

chrome/browser/net/gaia/token_service.cc

Index: chrome/browser/net/gaia/token_service.cc
diff --git a/chrome/browser/net/gaia/token_service.cc b/chrome/browser/net/gaia/token_service.cc
index 1bf202a56e88ea9873aa072277fa898488f7413e..0f2b1ac66f74559a7fc1321edd9e5ab4870f229f 100644
--- a/chrome/browser/net/gaia/token_service.cc
+++ b/chrome/browser/net/gaia/token_service.cc
@@ -110,11 +110,11 @@ void TokenService::EraseTokensFromDB() {
   web_data_service_->RemoveAllTokens();
 }
 
-const bool TokenService::AreCredentialsValid() const {
+bool TokenService::AreCredentialsValid() const {
   return !credentials_.lsid.empty() && !credentials_.sid.empty();
 }
 
-const bool TokenService::HasLsid() const {
+bool TokenService::HasLsid() const {
   return !credentials_.lsid.empty();
 }
 
@@ -134,7 +134,7 @@ void TokenService::StartFetchingTokens() {
 
 // Services dependent on a token will check if a token is available.
 // If it isn't, they'll go to sleep until they get a token event.
-const bool TokenService::HasTokenForService(const char* const service) const {
+bool TokenService::HasTokenForService(const char* const service) const {
   return token_map_.count(service) > 0;
 }