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

chrome/browser/autocomplete/autocomplete_popup_model_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 "chrome/browser/autocomplete/autocomplete_popup_model.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/browser/search_engines/template_url_service.h"
@@ skipping 68 matching lines @@
         template_url_service->GetTemplateURLForKeyword(keyword);
     match.template_url =
         TemplateURL::SupportsReplacement(template_url) ? template_url : NULL;
   }
   if (match.template_url)
     match.fill_into_edit = match.template_url->keyword() + char16(' ');
   else
     match.template_url = template_url_service->GetDefaultSearchProvider();
   match.fill_into_edit.append(query_string);
   match.transition = keyword.empty() ?
-      PageTransition::GENERATED : PageTransition::KEYWORD;
+      content::PAGE_TRANSITION_GENERATED : content::PAGE_TRANSITION_KEYWORD;
   return match;
 }
 
 void AutoCompletePopupModelTest::RunTest(const char* input,
                                          AutocompleteMatch::Type type,
                                          const char* keyword) {
   string16 keyword16(ASCIIToUTF16(keyword));
   string16 detected_keyword;
   EXPECT_FALSE(model_->GetKeywordForMatch(
     CreateMatch(keyword16, ASCIIToUTF16(input), type), &detected_keyword));
   EXPECT_EQ(keyword16, detected_keyword);
 }
 
 TEST_F(AutoCompletePopupModelTest, GetKeywordForMatch) {
   string16 keyword;
 
   // Possible matches when the input is "tfoo"
   RunTest("tfoo", AutocompleteMatch::SEARCH_WHAT_YOU_TYPED, "");
   RunTest("tfoo", AutocompleteMatch::SEARCH_HISTORY, "");
   RunTest("tfoo", AutocompleteMatch::SEARCH_SUGGEST, "");
 
   // Possible matches when the input is "t foo"
   RunTest("foo", AutocompleteMatch::SEARCH_HISTORY, "t");
   RunTest("foo", AutocompleteMatch::SEARCH_OTHER_ENGINE, "t");
 
   // Possible matches when the input is "k foo"
   RunTest("foo", AutocompleteMatch::SEARCH_HISTORY, "k");
   RunTest("foo", AutocompleteMatch::SEARCH_OTHER_ENGINE, "k");
 }