app_list: Fix shadow bleeds over launcher button and steals mouse events

ui/app_list/app_list_bubble_border.cc

 // Copyright (c) 2012 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 "ui/app_list/app_list_bubble_border.h"
 
 #include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/effects/SkGradientShader.h"
 #include "ui/gfx/canvas.h"
+#include "ui/gfx/path.h"
 #include "ui/gfx/skia_util.h"
 
 namespace {
 
 // Bubble border corner radius.
 const int kCornerRadius = 2;
 
 // Arrow width and height.
 const int kArrowHeight = 10;
 const int kArrowWidth = 20;
@@ skipping 96 matching lines @@
 
 namespace app_list {
 
 AppListBubbleBorder::AppListBubbleBorder(views::View* app_list_view,
                                          views::View* search_box_view)
     : views::BubbleBorder(views::BubbleBorder::BOTTOM_RIGHT,
                           views::BubbleBorder::NO_SHADOW),
       app_list_view_(app_list_view),
       search_box_view_(search_box_view) {
   const gfx::ShadowValue kShadows[] = {
-    // Offset (0, 5), blur=8, color=0.36 black
+    // Offset (0, 5), blur=30, color=0.36 black
     gfx::ShadowValue(gfx::Point(0, 5), 30, SkColorSetARGB(0x72, 0, 0, 0)),
   };
   shadows_.assign(kShadows, kShadows + arraysize(kShadows));
 }
 
 AppListBubbleBorder::~AppListBubbleBorder() {
 }
 
 bool AppListBubbleBorder::ArrowAtTopOrBottom() const {
   return arrow_location() == views::BubbleBorder::TOP_LEFT ||
       arrow_location() == views::BubbleBorder::TOP_RIGHT ||
       arrow_location() == views::BubbleBorder::BOTTOM_LEFT ||
       arrow_location() == views::BubbleBorder::BOTTOM_RIGHT;
 }
 
 bool AppListBubbleBorder::ArrowOnLeftOrRight() const {
   return arrow_location() == views::BubbleBorder::LEFT_TOP ||
       arrow_location() == views::BubbleBorder::LEFT_BOTTOM ||
       arrow_location() == views::BubbleBorder::RIGHT_TOP ||
       arrow_location() == views::BubbleBorder::RIGHT_BOTTOM;
 }
 
+void AppListBubbleBorder::GetMask(const gfx::Rect& bounds,
+                                  gfx::Path* mask) const {
+  gfx::Insets insets;
+  GetInsets(&insets);
+
+  gfx::Rect content_bounds(bounds);
+  content_bounds.Inset(insets);
+
+  BuildShape(content_bounds,
+             arrow_location(),
+             SkIntToScalar(GetArrowOffset()),
+             SkIntToScalar(kBorderSize),
+             mask);
+}
+
 int AppListBubbleBorder::GetArrowOffset() const {
   if (ArrowAtTopOrBottom()) {
     // Picks x offset and moves bubble arrow in the opposite direction.
     // i.e. If bubble bounds is moved to right (positive offset), we need to
     // move arrow to left so that it points to the same position.
     return -offset_.x();
   } else if (ArrowOnLeftOrRight()) {
     // Picks y offset and moves bubble arrow in the opposite direction.
     return -offset_.y();
   }
@@ skipping 166 matching lines @@
   canvas->ClipPath(path);
 
   // Use full bounds so that arrow is also painted.
   const gfx::Rect& bounds = view.bounds();
   PaintBackground(canvas, bounds);
 
   canvas->Restore();
 }
 
 }  // namespace app_list