Mac Overlays: Initialize edge aa mask

BUG=567946
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1573543002

Cr-Commit-Position: refs/heads/master@{#368780}

2 files changed, 7 insertions, 10 deletions

diff --git a/cc/output/ca_layer_overlay.cc b/cc/output/ca_layer_overlay.cc
index 01922ef..8704a06 100644
--- a/cc/output/ca_layer_overlay.cc
+++ b/cc/output/ca_layer_overlay.cc
@@ -136,6 +136,7 @@ CALayerResult FromDrawQuad(ResourceProvider* resource_provider,
   }
 
   // Enable edge anti-aliasing only on layer boundaries.
+  ca_layer_overlay->edge_aa_mask = 0;
   if (quad->IsLeftEdge())
     ca_layer_overlay->edge_aa_mask |= GL_CA_LAYER_EDGE_LEFT_CHROMIUM;
   if (quad->IsRightEdge())
@@ -210,11 +211,7 @@ CALayerResult FromDrawQuad(ResourceProvider* resource_provider,
 
 }  // namespace
 
-CALayerOverlay::CALayerOverlay()
-    : contents_resource_id(0),
-      opacity(1),
-      background_color(SK_ColorTRANSPARENT),
-      transform(SkMatrix44::kIdentity_Constructor) {}
+CALayerOverlay::CALayerOverlay() {}
 
 CALayerOverlay::~CALayerOverlay() {}
 
diff --git a/cc/output/ca_layer_overlay.h b/cc/output/ca_layer_overlay.h
index 3e8bd4a..ab234f4 100644
--- a/cc/output/ca_layer_overlay.h
+++ b/cc/output/ca_layer_overlay.h
@@ -22,19 +22,19 @@ class CC_EXPORT CALayerOverlay {
 
   // Texture that corresponds to an IOSurface to set as the content of the
   // CALayer. If this is 0 then the CALayer is a solid color.
-  unsigned contents_resource_id;
+  unsigned contents_resource_id = 0;
   // The contents rect property for the CALayer.
   gfx::RectF contents_rect;
   // The opacity property for the CAayer.
-  float opacity;
+  float opacity = 1;
   // The background color property for the CALayer.
-  SkColor background_color;
+  SkColor background_color = SK_ColorTRANSPARENT;
   // The edge anti-aliasing mask property for the CALayer.
-  unsigned edge_aa_mask;
+  unsigned edge_aa_mask = 0;
   // The bounds for the CALayer in pixels.
   gfx::SizeF bounds_size;
   // The transform to apply to the CALayer.
-  SkMatrix44 transform;
+  SkMatrix44 transform = SkMatrix44(SkMatrix44::kIdentity_Constructor);
 };
 
 typedef std::vector<CALayerOverlay> CALayerOverlayList;