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

chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_controller.h"
 
 #import <QuartzCore/QuartzCore.h>
 
 #include <limits>
 #include <string>
@@ skipping 1784 matching lines @@
   NSInteger index;
   WindowOpenDisposition disposition;
   [self droppingURLsAt:point
             givesIndex:&index
            disposition:&disposition];
 
   // Either insert a new tab or open in a current tab.
   switch (disposition) {
     case NEW_FOREGROUND_TAB: {
       UserMetrics::RecordAction(UserMetricsAction("Tab_DropURLBetweenTabs"));
-      browser::NavigateParams params(browser_, *url, PageTransition::TYPED);
+      browser::NavigateParams params(
+          browser_, *url, content::PAGE_TRANSITION_TYPED);
       params.disposition = disposition;
       params.tabstrip_index = index;
       params.tabstrip_add_types =
           TabStripModel::ADD_ACTIVE | TabStripModel::ADD_FORCE_INDEX;
       browser::Navigate(&params);
       break;
     }
     case CURRENT_TAB:
       UserMetrics::RecordAction(UserMetricsAction("Tab_DropURLOnTab"));
       tabStripModel_->GetTabContentsAt(index)
           ->tab_contents()->OpenURL(*url, GURL(), CURRENT_TAB,
-                                    PageTransition::TYPED);
+                                    content::PAGE_TRANSITION_TYPED);
       tabStripModel_->ActivateTabAt(index, true);
       break;
     default:
       NOTIMPLEMENTED();
   }
 }
 
 // (URLDropTargetController protocol)
 - (void)dropURLs:(NSArray*)urls inView:(NSView*)view at:(NSPoint)point {
   DCHECK_EQ(view, tabStripView_.get());
@@ skipping 189 matching lines @@
   NSInteger index = [self indexFromModelIndex:modelIndex];
   BrowserWindowController* controller =
       (BrowserWindowController*)[[switchView_ window] windowController];
   DCHECK(index >= 0);
   if (index >= 0) {
     [controller setTab:[self viewAtIndex:index] isDraggable:YES];
   }
 }
 
 @end