[Android]: Fix uninitialized read in AppBannerManager.

Bug: 1166410
Change-Id: Ifea16684b7d1d653ca2447b907eb217d09ce0abf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2632764
Commit-Queue: Finnur Thorarinsson <finnur@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844740}

chrome/browser/banners/android/java/src/org/chromium/chrome/browser/banners/AppBannerManagerTest.java

@@ -535,7 +535,6 @@ public class AppBannerManagerTest {
     }
 
     @Test
-    @DisabledTest(message = "https://crbug.com/1166410")
     @SmallTest
     @Feature({"AppBanners"})
     public void testAppInstalledModalNativeAppBannerBrowserTabWithUrl() throws Exception {
@@ -553,7 +552,6 @@ public class AppBannerManagerTest {
     }
 
     @Test
-    @DisabledTest(message = "https://crbug.com/1166410")
     @SmallTest
     @Feature({"AppBanners"})
     public void testAppInstalledModalNativeAppBannerCustomTab() throws Exception {
@@ -612,7 +610,6 @@ public class AppBannerManagerTest {
     }
 
     @Test
-    @DisabledTest(message = "https://crbug.com/1166410")
     @SmallTest
     @Feature({"AppBanners"})
     public void testModalNativeAppBannerCanBeTriggeredMultipleTimesBrowserTab() throws Exception {

chrome/browser/banners/app_banner_manager.cc

@@ -209,6 +209,7 @@ AppBannerManager::AppBannerManager(content::WebContents* web_contents)
     : content::WebContentsObserver(web_contents),
       SiteEngagementObserver(site_engagement::SiteEngagementService::Get(
           Profile::FromBrowserContext(web_contents->GetBrowserContext()))),
+      has_maskable_primary_icon_(false),
       state_(State::INACTIVE),
       manager_(InstallableManager::FromWebContents(web_contents)),
       has_sufficient_engagement_(false),