app_list: make launcher 95% opacity when blur is disabled

Bug: 757473
Test: tested with fullscreen app list flag and background blur flag
Change-Id: I1c5fbe9d69dc48b58b8f8181853de51ae22af9e9
Reviewed-on: https://chromium-review.googlesource.com/627696Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Qiang(Joe) Xu <warx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#496546}

ui/app_list/views/app_list_view.cc

@@ -222,6 +222,7 @@ class HideViewAnimationObserver : public ui::ImplicitAnimationObserver {
 AppListView::AppListView(AppListViewDelegate* delegate)
     : delegate_(delegate),
       is_fullscreen_app_list_enabled_(features::IsFullscreenAppListEnabled()),
+      is_background_blur_enabled_(features::IsBackgroundBlurEnabled()),
       display_observer_(this),
       animation_observer_(new HideViewAnimationObserver()),
       app_list_animation_duration_ms_(kAppListAnimationDurationMs) {
@@ -417,10 +418,10 @@ void AppListView::InitContents(gfx::NativeView parent, int initial_apps_page) {
     app_list_background_shield_ = new views::View;
     app_list_background_shield_->SetPaintToLayer(ui::LAYER_SOLID_COLOR);
     app_list_background_shield_->layer()->SetOpacity(
-        is_fullscreen_app_list_enabled_ ? kAppListOpacityWithBlur
-                                        : kAppListOpacity);
+        is_background_blur_enabled_ ? kAppListOpacityWithBlur
+                                    : kAppListOpacity);
     SetBackgroundShieldColor();
-    if (features::IsBackgroundBlurEnabled()) {
+    if (is_background_blur_enabled_) {
       app_list_background_shield_->layer()->SetBackgroundBlur(
           kAppListBlurRadius);
     }

ui/app_list/views/app_list_view.h

@@ -54,7 +54,7 @@ class APP_LIST_EXPORT AppListView : public views::BubbleDialogDelegateView,
   static constexpr float kNumOfShelfSize = 2.0;
 
   // The opacity of the app list background.
-  static constexpr float kAppListOpacity = 0.8;
+  static constexpr float kAppListOpacity = 0.95;
 
   // The opacity of the app list background with blur.
   static constexpr float kAppListOpacityWithBlur = 0.7;
@@ -334,6 +334,8 @@ class APP_LIST_EXPORT AppListView : public views::BubbleDialogDelegateView,
   float last_fling_velocity_ = 0;
   // Whether the fullscreen app list feature is enabled.
   const bool is_fullscreen_app_list_enabled_;
+  // Whether the background blur is enabled.
+  const bool is_background_blur_enabled_;
   // The state of the app list, controlled via SetState().
   AppListState app_list_state_ = PEEKING;
   // An observer that notifies AppListView when the display has changed.