Consistently use namespaced base::Version in plugins code.

chrome/common/pepper_flash.cc

Index: chrome/common/pepper_flash.cc
diff --git a/chrome/common/pepper_flash.cc b/chrome/common/pepper_flash.cc
index cad919947ea4b0f1de6a064de174363a56b38ac5..7eb5ae15085c33c9d1cb8af990e82354fc20076e 100644
--- a/chrome/common/pepper_flash.cc
+++ b/chrome/common/pepper_flash.cc
@@ -95,7 +95,7 @@ bool CheckPepperFlashInterfaces(const base::DictionaryValue& manifest) {
 }  // namespace
 
 bool CheckPepperFlashManifest(const base::DictionaryValue& manifest,
-                              Version* version_out) {
+                              base::Version* version_out) {
   std::string name;
   manifest.GetStringASCII("name", &name);
   // TODO(viettrungluu): Support WinFlapper for now, while we change the format
@@ -106,7 +106,7 @@ bool CheckPepperFlashManifest(const base::DictionaryValue& manifest,
 
   std::string proposed_version;
   manifest.GetStringASCII("version", &proposed_version);
-  Version version(proposed_version.c_str());
+  base::Version version(proposed_version.c_str());
   if (!version.IsValid())
     return false;