cc: Remove opaque rect from cc::Picture.

cc/resources/picture_unittest.cc

Index: cc/resources/picture_unittest.cc
diff --git a/cc/resources/picture_unittest.cc b/cc/resources/picture_unittest.cc
index e6d692bf4f491da163fa0b10d474b2eb88602602..fc259895904a46100e731d601bfeb0dc052111af 100644
--- a/cc/resources/picture_unittest.cc
+++ b/cc/resources/picture_unittest.cc
@@ -73,8 +73,6 @@ TEST(PictureTest, AsBase64String) {
 
     EXPECT_EQ(one_rect_picture->LayerRect(),
               one_rect_picture_check->LayerRect());
-    EXPECT_EQ(one_rect_picture->OpaqueRect(),
-              one_rect_picture_check->OpaqueRect());
     EXPECT_EQ(0, memcmp(one_rect_buffer, one_rect_buffer_check, 4 * 100 * 100));
   }
 
@@ -104,8 +102,6 @@ TEST(PictureTest, AsBase64String) {
 
     EXPECT_EQ(two_rect_picture->LayerRect(),
               two_rect_picture_check->LayerRect());
-    EXPECT_EQ(two_rect_picture->OpaqueRect(),
-              two_rect_picture_check->OpaqueRect());
     EXPECT_EQ(0, memcmp(two_rect_buffer, two_rect_buffer_check, 4 * 100 * 100));
   }
 }
@@ -438,8 +434,6 @@ TEST(PictureTest, CreateFromSkpValue) {
 
   EXPECT_EQ(100, one_rect_picture_check->LayerRect().width());
   EXPECT_EQ(200, one_rect_picture_check->LayerRect().height());
-  EXPECT_EQ(100, one_rect_picture_check->OpaqueRect().width());
-  EXPECT_EQ(200, one_rect_picture_check->OpaqueRect().height());
 }
 
 TEST(PictureTest, RecordingModes) {