[Suggestions] Create ImageEncoder, to abstract away image encode/decode.

components/suggestions.gypi

Index: components/suggestions.gypi
diff --git a/components/suggestions.gypi b/components/suggestions.gypi
index e03dc2199ea2793e1b3b1261008dd9ca751f624c..644c2025f12b9d3dc3342828b922593c082eae46 100644
--- a/components/suggestions.gypi
+++ b/components/suggestions.gypi
@@ -24,6 +24,7 @@
       'sources': [
         'suggestions/blacklist_store.cc',
         'suggestions/blacklist_store.h',
+        'suggestions/image_encoder.h',
         'suggestions/image_fetcher.h',
         'suggestions/image_fetcher_delegate.h',
         'suggestions/image_manager.cc',
@@ -45,4 +46,24 @@
       'includes': [ '../build/protoc.gypi' ],
     },
   ],
+  'conditions': [
+    ['OS != "ios"', {

[blundell, 2014/10/07 14:13:59]

You (or Justin) should have a comment to add here, as it's not clear why this
target should be !iOS.

[Mathieu, 2014/10/07 16:00:29]

Done.

+      'targets': [
+        {
+        # GN version: //components/suggestions:jpeg_image_encoder
+        'target_name': 'jpeg_image_encoder',
+        'type': 'static_library',
+        'dependencies': [
+          '../base/base.gyp:base',
+          '../ui/gfx/gfx.gyp:gfx',
+          'suggestions',
+        ],
+        'sources': [
+          'suggestions/jpeg_image_encoder.cc',
+          'suggestions/jpeg_image_encoder.h',
+        ],
+        }
+      ]
+    }]
+  ]
 }