Clang: enable -Wtautological-constant-out-of-range-compare

This warning was implemented in Clang a couple of weeks ago,
and now our code base is clean enough to enable it.

BUG=151927


Review URL: https://chromiumcodereview.appspot.com/11366060

git-svn-id: http://src.chromium.org/svn/trunk/src/build@165793 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -2525,22 +2525,12 @@
               # Warns on switches on enums that cover all enum values but
               # also contain a default: branch. Chrome is full of that.
               '-Wno-covered-switch-default',
-
-              # TODO(thakis): Remove this once http://crbug.com/151927 is fixed.
-              '-Wno-tautological-constant-out-of-range-compare',
             ],
             'cflags!': [
               # Clang doesn't seem to know know this flag.
               '-mfpmath=sse',
             ],
           }],
-          ['OS=="android"', {
-            'cflags!': [
-              # Clang ARM does not support the following option.
-              # TODO: Add this flag back http://crbug.com/157195.
-              '-Wno-tautological-constant-out-of-range-compare',
-            ]
-          }],
           ['clang==1 and clang_use_chrome_plugins==1', {
             'cflags': [
               '<@(clang_chrome_plugins_flags)',
@@ -3060,9 +3050,6 @@
                 # Warns on switches on enums that cover all enum values but
                 # also contain a default: branch. Chrome is full of that.
                 '-Wno-covered-switch-default',
-
-                # TODO(thakis): Remove this once http://crbug.com/151927 is fixed.
-                '-Wno-tautological-constant-out-of-range-compare',
               ],
             }],
             ['clang==1 and clang_use_chrome_plugins==1', {