ash: Update launcher background to 0.8 black.

- Change launcher background alpha from 128 (0.5) to 204 (0.8);
- Export the background alpha const and get rid of a dup const in overflow bubble;

BUG=137309
TEST=Verify launcher background is 0.8 black.


Review URL: https://chromiumcodereview.appspot.com/10827202

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150461 0039d316-1c4b-4281-b951-d872f2087c98

ash/launcher/launcher.cc

@@ -25,13 +25,6 @@
 
 namespace ash {
 
-namespace {
-
-// Max alpha of the background.
-const int kBackgroundAlpha = 128;
-
-}
-
 // The contents view of the Widget. This view contains LauncherView and
 // sizes it to the width of the widget minus the size of the status area.
 class Launcher::DelegateView : public views::WidgetDelegate,
@@ -105,7 +98,7 @@ Launcher::Launcher(aura::Window* window_container,
       launcher_view_(NULL),
       alignment_(SHELF_ALIGNMENT_BOTTOM),
       ALLOW_THIS_IN_INITIALIZER_LIST(
-          background_animator_(this, 0, kBackgroundAlpha)) {
+          background_animator_(this, 0, kLauncherBackgroundAlpha)) {
   model_.reset(new LauncherModel);
   if (Shell::GetInstance()->delegate()) {
     delegate_.reset(

ash/launcher/launcher_types.cc

@@ -7,6 +7,7 @@
 namespace ash {
 
 const int kLauncherPreferredSize = 48;
+const int kLauncherBackgroundAlpha = 204;
 
 LauncherItem::LauncherItem()
     : type(TYPE_TABBED),

ash/launcher/launcher_types.h

@@ -22,6 +22,9 @@ typedef int LauncherID;
 // added/removed.
 ASH_EXPORT extern const int kLauncherPreferredSize;
 
+// Max alpha of the launcher background.
+ASH_EXPORT extern const int kLauncherBackgroundAlpha;
+
 // Type the LauncherItem represents.
 enum LauncherItemType {
   // Represents a tabbed browser.

ash/launcher/overflow_bubble.cc

@@ -19,9 +19,6 @@ namespace internal {
 
 namespace {
 
-// This should be the same color as the darkest launcher bar.
-const SkColor kLauncherColor = SkColorSetARGB(0x80, 0, 0, 0);
-
 // Max bubble size to screen size ratio.
 const float kMaxBubbleSizeToScreenRatio = 0.5f;
 
@@ -121,7 +118,7 @@ void OverflowBubbleView::InitOverflowBubble(LauncherDelegate* delegate,
   set_anchor_view(anchor);
   set_arrow_location(GetBubbleArrowLocation(shelf_alignment));
   set_background(NULL);
-  set_color(kLauncherColor);
+  set_color(SkColorSetARGB(kLauncherBackgroundAlpha, 0, 0, 0));
   set_margins(gfx::Insets(kPadding, kPadding, kPadding, kPadding));
   set_move_with_anchor(true);
   views::BubbleDelegateView::CreateBubble(this);