Use EXPECT_EQ when possible.

EXPECT_RECT_EQ, EXPECT_SIZE_EQ, EXPECT_POINT_EQ, EXPECT_POINT3F_EQ
could be replaced by EXPECT_EQ.

Follow up of https://codereview.chromium.org/751453005/

Review URL: https://codereview.chromium.org/774763004

Cr-Commit-Position: refs/heads/master@{#306913}
18 files changed