Move PageTransition from //content/public/common to //ui/base

Move PageTransition enumeration from //content/public/common to //ui/base
so that it can be used by iOS and layered components that are used on iOS.

BUG=372373
[email protected], [email protected], [email protected]
TBR=ben, nasko

Review URL: https://codereview.chromium.org/562603002

Cr-Commit-Position: refs/heads/master@{#295686}
diff --git a/content/shell/browser/shell.cc b/content/shell/browser/shell.cc
index b10943d..685e5fe4 100644
--- a/content/shell/browser/shell.cc
+++ b/content/shell/browser/shell.cc
@@ -171,8 +171,8 @@
 
 void Shell::LoadURLForFrame(const GURL& url, const std::string& frame_name) {
   NavigationController::LoadURLParams params(url);
-  params.transition_type = PageTransitionFromInt(
-      PAGE_TRANSITION_TYPED | PAGE_TRANSITION_FROM_ADDRESS_BAR);
+  params.transition_type = ui::PageTransitionFromInt(
+      ui::PAGE_TRANSITION_TYPED | ui::PAGE_TRANSITION_FROM_ADDRESS_BAR);
   params.frame_name = frame_name;
   web_contents_->GetController().LoadURLWithParams(params);
   web_contents_->Focus();