Move PageTransition into content namespace. While I'm touching all these files, I've also updated...

chrome/browser/metrics/metrics_log_unittest.cc

 // Copyright (c) 2011 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 <string>
 
 #include "base/stringprintf.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "chrome/browser/metrics/metrics_log.h"
@@ skipping 130 matching lines @@
 
 TEST(MetricsLogTest, LoadEvent) {
   std::string expected_output = base::StringPrintf(
       "<log clientid=\"bogus client ID\" buildtime=\"123456789\" "
           "appversion=\"%s\">\n"
       " <document action=\"load\" docid=\"1\" window=\"3\" loadtime=\"7219\" "
           "origin=\"link\" session=\"0\" time=\"\"/>\n"
       "</log>", MetricsLog::GetVersionString().c_str());
 
   NoTimeMetricsLog log("bogus client ID", 0);
-  log.RecordLoadEvent(3, GURL("http://google.com"), PageTransition::LINK,
-                      1, TimeDelta::FromMilliseconds(7219));
+  log.RecordLoadEvent(3, GURL("http://google.com"),
+                      content::PAGE_TRANSITION_LINK, 1,
+                      TimeDelta::FromMilliseconds(7219));
 
   log.CloseLog();
 
   ASSERT_EQ(1, log.num_events());
 
   int size = log.GetEncodedLogSize();
   ASSERT_GT(size, 0);
 
   std::string encoded;
   // Leave room for the NUL terminator.
   ASSERT_TRUE(log.GetEncodedLog(WriteInto(&encoded, size + 1), size));
   TrimWhitespaceASCII(encoded, TRIM_ALL, &encoded);
   NormalizeBuildtime(&encoded);
   NormalizeBuildtime(&expected_output);
 
   ASSERT_EQ(expected_output, encoded);
 }
 
 #if defined(OS_CHROMEOS)
 TEST(MetricsLogTest, ChromeOSLoadEvent) {
   std::string expected_output = base::StringPrintf(
       "<log clientid=\"bogus client ID\" buildtime=\"123456789\" "
           "appversion=\"%s\" hardwareclass=\"sample-class\">\n"
       " <document action=\"load\" docid=\"1\" window=\"3\" loadtime=\"7219\" "
           "origin=\"link\" session=\"0\" time=\"\"/>\n"
       "</log>", MetricsLog::GetVersionString().c_str());
 
   NoTimeMetricsLog log("bogus client ID", 0);
-  log.RecordLoadEvent(3, GURL("http://google.com"), PageTransition::LINK,
-                      1, TimeDelta::FromMilliseconds(7219));
+  log.RecordLoadEvent(3, GURL("http://google.com"),
+                      content::PAGE_TRANSITION_LINK, 1,
+                      TimeDelta::FromMilliseconds(7219));
   log.set_hardware_class("sample-class");
   log.CloseLog();
 
   ASSERT_EQ(1, log.num_events());
 
   int size = log.GetEncodedLogSize();
   ASSERT_GT(size, 0);
 
   std::string encoded;
   // Leave room for the NUL terminator.
@@ skipping 70 matching lines @@
     // We're only checking the first 8 bytes, because that's what
     // the metrics server uses.
     std::string hash_hex = "0x";
     for (size_t j = 0; j < 8; j++) {
       base::StringAppendF(&hash_hex, "%02x",
                           static_cast<uint8>(hash_string.data()[j]));
     }
     EXPECT_EQ(cases[i].output, hash_hex);
   }
 };