Support 32-bit subversion fields in base::Version.

chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc

Index: chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc
diff --git a/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc b/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc
index 4eca8affbe670aa975dd0cff50dc0c88cf67b553..e8137fc54495c2b44911b7b9667616e01d9f62f1 100644
--- a/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc
+++ b/chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc
@@ -122,13 +122,13 @@ void RecordLinuxGlibcVersion() {
   UMALinuxGlibcVersion glibc_version_result = UMA_LINUX_GLIBC_NOT_PARSEABLE;
   if (version.IsValid() && version.components().size() == 2) {
     glibc_version_result = UMA_LINUX_GLIBC_UNKNOWN;
-    int glibc_major_version = version.components()[0];
-    int glibc_minor_version = version.components()[1];
+    uint32 glibc_major_version = version.components()[0];
+    uint32 glibc_minor_version = version.components()[1];
     if (glibc_major_version == 2) {
       // A constant to translate glibc 2.x minor versions to their
       // equivalent UMALinuxGlibcVersion values.
       const int kGlibcMinorVersionTranslationOffset = 11 - UMA_LINUX_GLIBC_2_11;
-      int translated_glibc_minor_version =
+      uint32 translated_glibc_minor_version =
           glibc_minor_version - kGlibcMinorVersionTranslationOffset;
       if (translated_glibc_minor_version >= UMA_LINUX_GLIBC_2_11) {
         glibc_version_result =