Add handler and mojo interface to accept android intent filters.

components/arc/intent_helper/local_activity_resolver.cc

 // Copyright 2016 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 "components/arc/intent_helper/local_activity_resolver.h"
 
 #include "url/gurl.h"
 
+namespace {
+
+constexpr char kIntentActionView[] = "android.intent.action.VIEW";
+constexpr char kIntentCategoryBrowsable[] = "android.intent.category.BROWSABLE";
+
+}  // namespace
+
 namespace arc {
 
+LocalActivityResolver::LocalActivityResolver() = default;
+
+LocalActivityResolver::~LocalActivityResolver() = default;
+
 bool LocalActivityResolver::ShouldChromeHandleUrl(const GURL& url) {
-  // Stub implementation for now.
+  if (!url.SchemeIsHTTPOrHTTPS()) {
+    // Chrome will handle everything that is not http and https.
+    return true;
+  }
+
+  for (const mojom::IntentFilterPtr& filter : intent_filters_) {
+    if (IsRelevantIntentFilter(filter)) {
+      // For now err on the side of caution and let Android
+      // handle cases where there are possible matching intent
+      // filters.
+      return false;
+    }
+  }
+
+  // Didn't find any matches for Android so let Chrome handle it.
   return true;
 }
 
+void LocalActivityResolver::UpdateIntentFilters(
+    mojo::Array<mojom::IntentFilterPtr> intent_filters) {
+  intent_filters_ = std::move(intent_filters);
+}
+
+bool LocalActivityResolver::IsRelevantIntentFilter(
+    const mojom::IntentFilterPtr& intent_filter) {
+  return FilterHasViewAction(intent_filter) &&
+         FilterCategoryIsBrowsable(intent_filter) &&
+         FilterHandlesWebSchemes(intent_filter);
+}
+
+bool LocalActivityResolver::FilterHasViewAction(
+    const mojom::IntentFilterPtr& intent_filter) {
+  for (const mojo::String& action : intent_filter->actions) {
+    if (action == kIntentActionView) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+bool LocalActivityResolver::FilterCategoryIsBrowsable(
+    const mojom::IntentFilterPtr& intent_filter) {
+  for (const mojo::String& category : intent_filter->categories) {
+    if (category == kIntentCategoryBrowsable) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+bool LocalActivityResolver::FilterHandlesWebSchemes(
+    const mojom::IntentFilterPtr& intent_filter) {
+  for (const mojo::String& scheme : intent_filter->data_schemes) {
+    if (scheme == "http" || scheme == "https") {

[dcheng, 2016/06/24 22:32:35]

Use kHttpScheme and kHttpsScheme at least. I don't really like this, but I don't
have a better idea without knowing how this code is going to evolve.

[zentaro, 2016/06/27 16:15:38]

Done.

+      return true;
+    }
+  }
+
+  return false;
+}
+
 }  // namespace arc