cros: Fix browser header wrongly drawn frame image

ui/gfx/canvas.cc

Index: ui/gfx/canvas.cc
diff --git a/ui/gfx/canvas.cc b/ui/gfx/canvas.cc
index b2d90aec4189b22975350b0e57b77b7da60858c9..d7f0ef8011ce67d7d5d370bce15114b4f0eee6f7 100644
--- a/ui/gfx/canvas.cc
+++ b/ui/gfx/canvas.cc
@@ -491,7 +491,19 @@ void Canvas::TileImageInt(const ImageSkia& image,
                           int dest_y,
                           int w,
                           int h) {
-  TileImageInt(image, src_x, src_y, 1.0f, 1.0f, dest_x, dest_y, w, h);
+  cc::PaintFlags flags;
+  TileImageInt(image, src_x, src_y, 1.0f, 1.0f, dest_x, dest_y, w, h, &flags);
+}
+
+void Canvas::TileImageInt(const ImageSkia& image,
+                          int src_x,
+                          int src_y,
+                          int dest_x,
+                          int dest_y,
+                          int w,
+                          int h,
+                          cc::PaintFlags* flags) {
+  TileImageInt(image, src_x, src_y, 1.0f, 1.0f, dest_x, dest_y, w, h, flags);
 }
 
 void Canvas::TileImageInt(const ImageSkia& image,
@@ -502,7 +514,8 @@ void Canvas::TileImageInt(const ImageSkia& image,
                           int dest_x,
                           int dest_y,
                           int w,
-                          int h) {
+                          int h,
+                          cc::PaintFlags* flags) {
   SkRect dest_rect = { SkIntToScalar(dest_x),
                        SkIntToScalar(dest_y),
                        SkIntToScalar(dest_x + w),
@@ -510,10 +523,10 @@ void Canvas::TileImageInt(const ImageSkia& image,
   if (!IntersectsClipRect(dest_rect))
     return;
 
-  cc::PaintFlags flags;
+  DCHECK(flags);
   if (InitPaintFlagsForTiling(image, src_x, src_y, tile_scale_x, tile_scale_y,
-                              dest_x, dest_y, &flags))
-    canvas_->drawRect(dest_rect, flags);
+                              dest_x, dest_y, flags))
+    canvas_->drawRect(dest_rect, *flags);
 }
 
 bool Canvas::InitPaintFlagsForTiling(const ImageSkia& image,
@@ -536,7 +549,6 @@ bool Canvas::InitPaintFlagsForTiling(const ImageSkia& image,
 
   flags->setShader(CreateImageRepShader(image_rep, SkShader::kRepeat_TileMode,
                                         shader_scale));
-  flags->setBlendMode(SkBlendMode::kSrcOver);
   return true;
 }