Porting changes in chrome/{browser,common}, also enabling more unit tests....

chrome/browser/printing/page_range_unittest.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/printing/page_range.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 TEST(PageRangeTest, RangeMerge) {
   printing::PageRanges ranges;
   printing::PageRange range;
   range.from = 1;
   range.to = 3;
   ranges.push_back(range);
   range.from = 10;
   range.to = 12;
   ranges.push_back(range);
   range.from = 2;
   range.to = 5;
   ranges.push_back(range);
   std::vector<int> pages(printing::PageRange::GetPages(ranges));
-  ASSERT_EQ(8, pages.size());
+  ASSERT_EQ(8U, pages.size());
   EXPECT_EQ(1, pages[0]);
   EXPECT_EQ(2, pages[1]);
   EXPECT_EQ(3, pages[2]);
   EXPECT_EQ(4, pages[3]);
   EXPECT_EQ(5, pages[4]);
   EXPECT_EQ(10, pages[5]);
   EXPECT_EQ(11, pages[6]);
   EXPECT_EQ(12, pages[7]);
 }
 
 TEST(PageRangeTest, Empty) {
   printing::PageRanges ranges;
   std::vector<int> pages(printing::PageRange::GetPages(ranges));
-  EXPECT_EQ(0, pages.size());
+  EXPECT_EQ(0U, pages.size());
 }