[ntp4] Use highest quality jpeg compression for thumbnail images.

BUG=94640
TEST=Verify thumbnails are still added to NTP page.
Review URL: http://codereview.chromium.org/8631002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111720 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 4 insertions, 5 deletions

diff --git a/ui/gfx/image/image_util.cc b/ui/gfx/image/image_util.cc
index a73b1f1..314d4b5 100644
--- a/ui/gfx/image/image_util.cc
+++ b/ui/gfx/image/image_util.cc
@@ -26,7 +26,7 @@ bool PNGEncodedDataFromImage(const Image& image,
   return gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, false, dst);
 }
 
-bool JPEGEncodedDataFromImage(const Image& image,
+bool JPEGEncodedDataFromImage(const Image& image, int quality,
                               std::vector<unsigned char>* dst) {
   const SkBitmap& bitmap = image;
   SkAutoLockPixels bitmap_lock(bitmap);
@@ -34,14 +34,11 @@ bool JPEGEncodedDataFromImage(const Image& image,
   if (!bitmap.readyToDraw())
     return false;
 
-  // Use 90 quality (out of 100) which is pretty high, because
-  // we're very sensitive to artifacts for these small sized,
-  // highly detailed images.
   return gfx::JPEGCodec::Encode(
           reinterpret_cast<unsigned char*>(bitmap.getAddr32(0, 0)),
           gfx::JPEGCodec::FORMAT_BGRA, bitmap.width(),
           bitmap.height(),
-          static_cast<int>(bitmap.rowBytes()), 90,
+          static_cast<int>(bitmap.rowBytes()), quality,
           dst);
 }
 
diff --git a/ui/gfx/image/image_util.h b/ui/gfx/image/image_util.h
index 92f9224..e102f71 100644
--- a/ui/gfx/image/image_util.h
+++ b/ui/gfx/image/image_util.h
@@ -28,8 +28,10 @@ UI_EXPORT bool PNGEncodedDataFromImage(const Image& image,
                                        std::vector<unsigned char>* dst);
 
 // Fills the |dst| vector with JPEG-encoded bytes based on the given Image.
+// |quality| determines the compression level, 0 == lowest, 100 == highest.
 // Returns true if the Image was encoded successfully.
 UI_EXPORT bool JPEGEncodedDataFromImage(const Image& image,
+                                        int quality,
                                         std::vector<unsigned char>* dst);
 
 }