Add "Request app banner" context menu in DevTools

BUG=540491
Demo: https://drive.google.com/file/d/0B6skYAFVnosEc1RQRm9KYmxCeXM/view?usp=sharing

When the user clicks "Request app banner" context menu, Chrome tries to open
"add to homescreen" banner. And if error happens, it will show the detailed
information about why the app banner is not opened even if
"bypass-app-banner-engagement-checks" flag is not set.

RequestAppBanner method from DevTools is handled like this:
 Android:
  PageHandler::RequestAppBanner()
   -> TabWebContentsDelegateAndroid::RequestAppBanner()
    -> Java TabWebContentsDelegateAndroid.requestAppBanner()
     -> Java Tab.requestAppBanner()
      -> Java AppBannerManager.requestAppBanner()
       -> nativeRequestAppBanner()
        -> AppBannerManagerAndroid::RequestAppBanner()
         -> AppBannerManager::TriggerAppBannerFetch()

 Desktop:
  PageHandler::RequestAppBanner()
   -> Browser::RequestAppBanner()
    -> AppBannerManager::TriggerAppBannerFetch()

Review URL: https://codereview.chromium.org/1569893003

Cr-Commit-Position: refs/heads/master@{#371239}

1 files changed, 39 insertions, 26 deletions

diff --git a/chrome/browser/banners/app_banner_data_fetcher.cc b/chrome/browser/banners/app_banner_data_fetcher.cc
index 321e8d3..d953485 100644
--- a/chrome/browser/banners/app_banner_data_fetcher.cc
+++ b/chrome/browser/banners/app_banner_data_fetcher.cc
@@ -71,11 +71,11 @@ void AppBannerDataFetcher::SetTimeDeltaForTesting(int days) {
   gTimeDeltaForTesting = base::TimeDelta::FromDays(days);
 }
 
-AppBannerDataFetcher::AppBannerDataFetcher(
-    content::WebContents* web_contents,
-    base::WeakPtr<Delegate> delegate,
-    int ideal_icon_size_in_dp,
-    int minimum_icon_size_in_dp)
+AppBannerDataFetcher::AppBannerDataFetcher(content::WebContents* web_contents,
+                                           base::WeakPtr<Delegate> delegate,
+                                           int ideal_icon_size_in_dp,
+                                           int minimum_icon_size_in_dp,
+                                           bool is_debug_mode)
     : WebContentsObserver(web_contents),
       weak_delegate_(delegate),
       ideal_icon_size_in_dp_(ideal_icon_size_in_dp),
@@ -83,6 +83,9 @@ AppBannerDataFetcher::AppBannerDataFetcher(
       is_active_(false),
       was_canceled_by_page_(false),
       page_requested_prompt_(false),
+      is_debug_mode_(is_debug_mode ||
+                     base::CommandLine::ForCurrentProcess()->HasSwitch(
+                         switches::kBypassAppBannerEngagementChecks)),
       event_request_id_(-1) {
   DCHECK(minimum_icon_size_in_dp <= ideal_icon_size_in_dp);
 }
@@ -184,7 +187,8 @@ void AppBannerDataFetcher::OnBannerPromptReply(
       !page_requested_prompt_) {
     was_canceled_by_page_ = true;
     referrer_ = referrer;
-    OutputDeveloperNotShownMessage(web_contents, kRendererRequestCancel);
+    OutputDeveloperNotShownMessage(web_contents, kRendererRequestCancel,
+                                   is_debug_mode_);
     return;
   }
 
@@ -250,7 +254,7 @@ void AppBannerDataFetcher::OnDidHasManifest(bool has_manifest) {
 
   if (!CheckFetcherIsStillAlive(web_contents) || !has_manifest) {
     if (!has_manifest)
-      OutputDeveloperNotShownMessage(web_contents, kNoManifest);
+      OutputDeveloperNotShownMessage(web_contents, kNoManifest, is_debug_mode_);
 
     Cancel();
     return;
@@ -268,7 +272,8 @@ void AppBannerDataFetcher::OnDidGetManifest(
     return;
   }
   if (manifest.IsEmpty()) {
-    OutputDeveloperNotShownMessage(web_contents, kManifestEmpty);
+    OutputDeveloperNotShownMessage(web_contents, kManifestEmpty,
+                                   is_debug_mode_);
     Cancel();
     return;
   }
@@ -278,12 +283,13 @@ void AppBannerDataFetcher::OnDidGetManifest(
     for (const auto& application : manifest.related_applications) {
       std::string platform = base::UTF16ToUTF8(application.platform.string());
       std::string id = base::UTF16ToUTF8(application.id.string());
-      if (weak_delegate_->HandleNonWebApp(platform, application.url, id))
+      if (weak_delegate_->HandleNonWebApp(platform, application.url, id,
+                                          is_debug_mode_))
         return;
     }
   }
 
-  if (!IsManifestValidForWebApp(manifest, web_contents)) {
+  if (!IsManifestValidForWebApp(manifest, web_contents, is_debug_mode_)) {
     Cancel();
     return;
   }
@@ -293,9 +299,9 @@ void AppBannerDataFetcher::OnDidGetManifest(
 
   if (IsWebAppInstalled(web_contents->GetBrowserContext(),
                         manifest.start_url) &&
-      !base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kBypassAppBannerEngagementChecks)) {
-    OutputDeveloperNotShownMessage(web_contents, kBannerAlreadyAdded);
+      !is_debug_mode_) {
+    OutputDeveloperNotShownMessage(web_contents, kBannerAlreadyAdded,
+                                   is_debug_mode_);
     Cancel();
     return;
   }
@@ -327,7 +333,8 @@ void AppBannerDataFetcher::OnDidCheckHasServiceWorker(
 
   if (!has_service_worker) {
     TrackDisplayEvent(DISPLAY_EVENT_LACKS_SERVICE_WORKER);
-    OutputDeveloperNotShownMessage(web_contents, kNoMatchingServiceWorker);
+    OutputDeveloperNotShownMessage(web_contents, kNoMatchingServiceWorker,
+                                   is_debug_mode_);
     Cancel();
     return;
   }
@@ -345,7 +352,8 @@ void AppBannerDataFetcher::OnHasServiceWorker(
         gfx::Screen::GetScreenFor(web_contents->GetNativeView()));
 
   if (!FetchAppIcon(web_contents, icon_url)) {
-    OutputDeveloperNotShownMessage(web_contents, kCannotDetermineBestIcon);
+    OutputDeveloperNotShownMessage(web_contents, kCannotDetermineBestIcon,
+                                   is_debug_mode_);
     Cancel();
   }
 }
@@ -370,16 +378,18 @@ void AppBannerDataFetcher::OnAppIconFetched(const SkBitmap& bitmap) {
     return;
   }
   if (bitmap.drawsNothing()) {
-    OutputDeveloperNotShownMessage(web_contents, kNoIconAvailable);
+    OutputDeveloperNotShownMessage(web_contents, kNoIconAvailable,
+                                   is_debug_mode_);
     Cancel();
     return;
   }
 
   RecordCouldShowBanner();
-  if (!CheckIfShouldShowBanner()) {
+  if (!is_debug_mode_ && !CheckIfShouldShowBanner()) {
     // At this point, the only possible case is that the banner has been added
     // to the homescreen, given all of the other checks that have been made.
-    OutputDeveloperNotShownMessage(web_contents, kBannerAlreadyAdded);
+    OutputDeveloperNotShownMessage(web_contents, kBannerAlreadyAdded,
+                                   is_debug_mode_);
     Cancel();
     return;
   }
@@ -419,8 +429,8 @@ bool AppBannerDataFetcher::CheckIfShouldShowBanner() {
 bool AppBannerDataFetcher::CheckFetcherIsStillAlive(
     content::WebContents* web_contents) {
   if (!is_active_) {
-    OutputDeveloperNotShownMessage(web_contents,
-                                   kUserNavigatedBeforeBannerShown);
+    OutputDeveloperNotShownMessage(
+        web_contents, kUserNavigatedBeforeBannerShown, is_debug_mode_);
     return false;
   }
   if (!web_contents) {
@@ -432,22 +442,25 @@ bool AppBannerDataFetcher::CheckFetcherIsStillAlive(
 // static
 bool AppBannerDataFetcher::IsManifestValidForWebApp(
     const content::Manifest& manifest,
-    content::WebContents* web_contents) {
+    content::WebContents* web_contents,
+    bool is_debug_mode) {
   if (manifest.IsEmpty()) {
-    OutputDeveloperNotShownMessage(web_contents, kManifestEmpty);
+    OutputDeveloperNotShownMessage(web_contents, kManifestEmpty, is_debug_mode);
     return false;
   }
   if (!manifest.start_url.is_valid()) {
-    OutputDeveloperNotShownMessage(web_contents, kStartURLNotValid);
+    OutputDeveloperNotShownMessage(web_contents, kStartURLNotValid,
+                                   is_debug_mode);
     return false;
   }
   if (manifest.name.is_null() && manifest.short_name.is_null()) {
-    OutputDeveloperNotShownMessage(web_contents,
-                                   kManifestMissingNameOrShortName);
+    OutputDeveloperNotShownMessage(
+        web_contents, kManifestMissingNameOrShortName, is_debug_mode);
     return false;
   }
   if (!DoesManifestContainRequiredIcon(manifest)) {
-    OutputDeveloperNotShownMessage(web_contents, kManifestMissingSuitableIcon);
+    OutputDeveloperNotShownMessage(web_contents, kManifestMissingSuitableIcon,
+                                   is_debug_mode);
     return false;
   }
   return true;