chromiumos-assets: Update boot splash screen.

This updates the "chromium" text and removes the logo.

Change-Id: I56dceb9eb519a913646d86ba9cccb3b29970b2c1

BUG=none
TEST=copied to a device and booted it

Review URL: http://codereview.chromium.org/6771032
diff --git a/images/boot_splash_frame01.png b/images/boot_splash_frame01.png
index 46ae60d..badbdb0 100644
--- a/images/boot_splash_frame01.png
+++ b/images/boot_splash_frame01.png
Binary files differ
diff --git a/images/boot_splash_frame02.png b/images/boot_splash_frame02.png
index 1b7d52d..c9cfa16 100644
--- a/images/boot_splash_frame02.png
+++ b/images/boot_splash_frame02.png
Binary files differ
diff --git a/images/boot_splash_frame03.png b/images/boot_splash_frame03.png
index 75323f1..0ed4fa3 100644
--- a/images/boot_splash_frame03.png
+++ b/images/boot_splash_frame03.png
Binary files differ
diff --git a/images/boot_splash_frame04.png b/images/boot_splash_frame04.png
index 0f80096..746d01b 100644
--- a/images/boot_splash_frame04.png
+++ b/images/boot_splash_frame04.png
Binary files differ
diff --git a/images/boot_splash_frame05.png b/images/boot_splash_frame05.png
index 7971b09..c7a943b 100644
--- a/images/boot_splash_frame05.png
+++ b/images/boot_splash_frame05.png
Binary files differ