Add autocomplete provider for "about:" URLs.

This is a reworked version of r74451 that makes the following changes:
  * Removed function to convert an about: string to a URL.  We don't need this in the autocomplete side because the "about:" URLs will be correctly handled when the user hits enter; and removing it means we don't need to ensure that the data provider is initialized, because that will also be done automatically.
  * Clean up the about:about HTML construction to be shorter and produce slightly more readable source code
  * Remove about:vaporware (cleared with thakis, who added it)

(Obviously, the last two changes are "while I'm here, ..." cleanups.)

BUG=6870
TEST=Typing "about:s" into the omnibox should result in a couple of "about:s..." URL entries in the dropdown even if you've never visited them.
Review URL: http://codereview.chromium.org/6474019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@75691 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 51 insertions, 0 deletions

diff --git a/chrome/browser/autocomplete/builtin_provider.cc b/chrome/browser/autocomplete/builtin_provider.cc
new file mode 100644
index 0000000..355158d
--- /dev/null
+++ b/chrome/browser/autocomplete/builtin_provider.cc
@@ -0,0 +1,51 @@
+// 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/builtin_provider.h"
+
+#include "base/string_util.h"
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/autocomplete/autocomplete_match.h"
+#include "chrome/browser/browser_about_handler.h"
+#include "chrome/browser/net/url_fixer_upper.h"
+
+const int BuiltinProvider::kRelevance = 575;
+
+BuiltinProvider::BuiltinProvider(ACProviderListener* listener,
+                                 Profile* profile)
+    : AutocompleteProvider(listener, profile, "Builtin") {
+  std::vector<std::string> builtins(AboutPaths());
+  for (std::vector<std::string>::iterator i(builtins.begin());
+       i != builtins.end(); ++i)
+    builtins_.push_back(ASCIIToUTF16("about:") + ASCIIToUTF16(*i));
+}
+
+void BuiltinProvider::Start(const AutocompleteInput& input,
+                            bool minimal_changes) {
+  matches_.clear();
+  if ((input.type() == AutocompleteInput::INVALID) ||
+      (input.type() == AutocompleteInput::FORCED_QUERY) ||
+      (input.type() == AutocompleteInput::QUERY))
+    return;
+  for (Builtins::const_iterator i(builtins_.begin());
+       (i != builtins_.end()) && (matches_.size() < kMaxMatches); ++i) {
+    if (StartsWith(*i, input.text(), false)) {
+      AutocompleteMatch match(this, kRelevance, false,
+                              AutocompleteMatch::NAVSUGGEST);
+      match.fill_into_edit = *i;
+      match.destination_url = GURL(*i);
+      match.contents = match.fill_into_edit;
+      match.contents_class.push_back(ACMatchClassification(0,
+          ACMatchClassification::MATCH | ACMatchClassification::URL));
+      if (match.contents.length() > input.text().length()) {
+        match.contents_class.push_back(
+            ACMatchClassification(input.text().length(),
+                                  ACMatchClassification::URL));
+      }
+      matches_.push_back(match);
+    }
+  }
+  for (size_t i = 0; i < matches_.size(); ++i)
+    matches_[i].relevance = kRelevance + matches_.size() - (i + 1);
+}