[color] Replace a few image SK_Color constants

These image colors are either used as placeholder background colors or
error colors. We can safely replace them with kPlaceholderColor.

BUG=1059867

Change-Id: Ie4485eb333dae5d52a238eeeb8e9cf6c6391553c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2134625Reviewed-by: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Wei Li <weili@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756110}

ui/gfx/image/image_skia_operations.cc

@@ -15,6 +15,7 @@
 #include "third_party/skia/include/core/SkClipOp.h"
 #include "third_party/skia/include/core/SkDrawLooper.h"
 #include "ui/gfx/canvas.h"
+#include "ui/gfx/color_palette.h"
 #include "ui/gfx/geometry/insets.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/point_conversions.h"
@@ -47,7 +48,7 @@ gfx::Rect DIPToPixelBounds(gfx::Rect dip_bounds, float scale) {
 ImageSkiaRep GetErrorImageRep(float scale, const gfx::Size& pixel_size) {
   SkBitmap bitmap;
   bitmap.allocN32Pixels(pixel_size.width(), pixel_size.height());
-  bitmap.eraseColor(SK_ColorRED);
+  bitmap.eraseColor(kPlaceholderColor);
   return gfx::ImageSkiaRep(bitmap, scale);
 }
 

ui/gfx/image/image_skia_rep_default.cc

@@ -9,6 +9,7 @@
 #include "cc/paint/record_paint_canvas.h"
 #include "cc/paint/skia_paint_canvas.h"
 #include "third_party/skia/include/core/SkCanvas.h"
+#include "ui/gfx/color_palette.h"
 
 namespace gfx {
 
@@ -19,7 +20,7 @@ ImageSkiaRep::ImageSkiaRep(const gfx::Size& size, float scale)
     : type_(ImageRepType::kImageTypeBitmap), scale_(scale) {
   bitmap_.allocN32Pixels(static_cast<int>(size.width() * this->scale()),
                          static_cast<int>(size.height() * this->scale()));
-  bitmap_.eraseColor(SK_ColorRED);
+  bitmap_.eraseColor(kPlaceholderColor);
   bitmap_.setImmutable();
   pixel_size_.SetSize(bitmap_.width(), bitmap_.height());
   paint_image_ = cc::PaintImage::CreateFromBitmap(bitmap_);

ui/gfx/image/image_skia_rep_ios.cc

@@ -5,6 +5,7 @@
 #include "ui/gfx/image/image_skia_rep_ios.h"
 
 #include "base/logging.h"
+#include "ui/gfx/color_palette.h"
 
 namespace gfx {
 
@@ -13,7 +14,7 @@ ImageSkiaRep::ImageSkiaRep() : scale_(0.0f) {}
 ImageSkiaRep::ImageSkiaRep(const gfx::Size& size, float scale) : scale_(scale) {
   bitmap_.allocN32Pixels(static_cast<int>(size.width() * this->scale()),
                          static_cast<int>(size.height() * this->scale()));
-  bitmap_.eraseColor(SK_ColorRED);
+  bitmap_.eraseColor(kPlaceholderColor);
   bitmap_.setImmutable();
   pixel_size_.SetSize(bitmap_.width(), bitmap_.height());
 }