Update all users of base::Version to explicitly specify the namespace, and clean up the header.

gpu/config/gpu_info_collector_win.cc

Index: gpu/config/gpu_info_collector_win.cc
diff --git a/gpu/config/gpu_info_collector_win.cc b/gpu/config/gpu_info_collector_win.cc
index 64672625e5fcfb02e779c87ddd536de725643485..db608d9c4783a95235844bc0e8872e3a9631da7a 100644
--- a/gpu/config/gpu_info_collector_win.cc
+++ b/gpu/config/gpu_info_collector_win.cc
@@ -170,23 +170,23 @@ GpuPerformanceStats RetrieveGpuPerformanceStatsWithHistograms() {
 
 // Returns the display link driver version or an invalid version if it is
 // not installed.
-Version DisplayLinkVersion() {
+base::Version DisplayLinkVersion() {
   base::win::RegKey key;
 
   if (key.Open(HKEY_LOCAL_MACHINE, L"SOFTWARE", KEY_READ | KEY_WOW64_64KEY))
-    return Version();
+    return base::Version();
 
   if (key.OpenKey(L"DisplayLink", KEY_READ | KEY_WOW64_64KEY))
-    return Version();
+    return base::Version();
 
   if (key.OpenKey(L"Core", KEY_READ | KEY_WOW64_64KEY))
-    return Version();
+    return base::Version();
 
   base::string16 version;
   if (key.ReadValue(L"Version", &version))
-    return Version();
+    return base::Version();
 
-  return Version(WideToASCII(version));
+  return base::Version(WideToASCII(version));
 }
 
 // Returns whether Lenovo dCute is installed.