Set desired_image_size when decoding images for NTP Tile icons.

ios/chrome/browser/suggestions/ios_image_decoder_impl_unittest.mm

Index: ios/chrome/browser/suggestions/ios_image_decoder_impl_unittest.mm
diff --git a/ios/chrome/browser/suggestions/ios_image_decoder_impl_unittest.mm b/ios/chrome/browser/suggestions/ios_image_decoder_impl_unittest.mm
index d7115b772fe2bad0451ffbdd0738829af8f58b49..2cb03e981dab70d4a0d2cde3a3a14b0735d7d562 100644
--- a/ios/chrome/browser/suggestions/ios_image_decoder_impl_unittest.mm
+++ b/ios/chrome/browser/suggestions/ios_image_decoder_impl_unittest.mm
@@ -13,6 +13,7 @@
 #include "base/threading/thread_task_runner_handle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
+#include "ui/gfx/geometry/size.h"
 #include "ui/gfx/image/image.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
@@ -82,8 +83,9 @@ TEST_F(IOSImageDecoderImplTest, JPGImage) {
   std::string image_data =
       std::string(reinterpret_cast<char*>(kJPGImage), sizeof(kJPGImage));
   ios_image_decoder_impl_->DecodeImage(
-      image_data, base::Bind(&IOSImageDecoderImplTest::OnImageDecoded,
-                             base::Unretained(this)));
+      image_data, gfx::Size(),
+      base::Bind(&IOSImageDecoderImplTest::OnImageDecoded,
+                 base::Unretained(this)));
 
   pool_->FlushForTesting();
   base::RunLoop().RunUntilIdle();
@@ -97,8 +99,9 @@ TEST_F(IOSImageDecoderImplTest, WebpImage) {
   std::string image_data =
       std::string(reinterpret_cast<char*>(kWEBPImage), sizeof(kWEBPImage));
   ios_image_decoder_impl_->DecodeImage(
-      image_data, base::Bind(&IOSImageDecoderImplTest::OnImageDecoded,
-                             base::Unretained(this)));
+      image_data, gfx::Size(),
+      base::Bind(&IOSImageDecoderImplTest::OnImageDecoded,
+                 base::Unretained(this)));
 
   pool_->FlushForTesting();
   base::RunLoop().RunUntilIdle();