Plugs in the new thumbnailing algorithm to ThumbnailTabHelper.

chrome/browser/thumbnails/simple_thumbnail_crop_unittest.cc

Index: chrome/browser/thumbnails/simple_thumbnail_crop_unittest.cc
diff --git a/chrome/browser/thumbnails/simple_thumbnail_crop_unittest.cc b/chrome/browser/thumbnails/simple_thumbnail_crop_unittest.cc
index 54d0bcd80f34822e8a5496cdd42ca04ff5fb758f..312540ab48f4645b6a7b918aecfb9d048fbfb9be 100644
--- a/chrome/browser/thumbnails/simple_thumbnail_crop_unittest.cc
+++ b/chrome/browser/thumbnails/simple_thumbnail_crop_unittest.cc
@@ -196,3 +196,37 @@ TEST_F(SimpleThumbnailCropTest, GetCanvasCopyInfo) {
   EXPECT_EQ(thumbnails::CLIP_RESULT_SOURCE_IS_SMALLER, clip_result);
   EXPECT_EQ(thumbnail_size, target_size_result);
 }
+
+TEST_F(SimpleThumbnailCropTest, GetClippingRect) {
+  const gfx::Size desired_size(300, 200);
+  thumbnails::ClipResult clip_result;
+  // Try out 'microsource'.
+  gfx::Rect clip_rect = SimpleThumbnailCrop::GetClippingRect(
+      gfx::Size(300, 199), desired_size, &clip_result);
+  EXPECT_EQ(clip_result, thumbnails::CLIP_RESULT_SOURCE_IS_SMALLER);
+  EXPECT_EQ(clip_rect.origin(), gfx::Point(0, 0));
+  EXPECT_EQ(clip_rect.size(), desired_size);
+
+  // Portrait source.
+  clip_rect = SimpleThumbnailCrop::GetClippingRect(
+      gfx::Size(500, 1200), desired_size, &clip_result);
+  EXPECT_EQ(clip_result, thumbnails::CLIP_RESULT_TALLER_THAN_WIDE);
+  EXPECT_EQ(clip_rect.origin(), gfx::Point(0, 0));
+  EXPECT_EQ(clip_rect.width(), 500);
+  EXPECT_LT(clip_rect.height(), 1200);
+
+  clip_rect = SimpleThumbnailCrop::GetClippingRect(
+      gfx::Size(2000, 800), desired_size, &clip_result);
+  EXPECT_TRUE(clip_result == thumbnails::CLIP_RESULT_WIDER_THAN_TALL ||
+              clip_result == thumbnails::CLIP_RESULT_MUCH_WIDER_THAN_TALL);
+  EXPECT_EQ(clip_rect.y(), 0);
+  EXPECT_GT(clip_rect.x(), 0);
+  EXPECT_LT(clip_rect.width(), 2000);
+  EXPECT_EQ(clip_rect.height(), 800);
+
+  clip_rect = SimpleThumbnailCrop::GetClippingRect(
+      gfx::Size(900, 600), desired_size, &clip_result);
+  EXPECT_EQ(clip_result, thumbnails::CLIP_RESULT_NOT_CLIPPED);
+  EXPECT_EQ(clip_rect.origin(), gfx::Point(0, 0));
+  EXPECT_EQ(clip_rect.size(), gfx::Size(900, 600));
+}