Port renaming changes from AOMedia

Cherry-Picked the following commits:
0defd8f Changed "WebM" to "AOMedia" & "webm" to "aomedia"
54e6676 Replace "VPx" by "AVx"
5082a36 Change "Vpx" to "Avx"
7df44f1 Replace "Vp9" w/ "Av1"
967f722 Remove kVp9CodecId
828f30c Change "Vp8" to "AOM"
030b5ff AUTHORS regenerated
2524cae Add ref-mv experimental flag
016762b Change copyright notice to AOMedia form
81e5526 Replace vp9 w/ av1
9b94565 Add missing files
fa8ca9f Change "vp9" to "av1"
ec838b7  Convert "vp8" to "aom"
80edfa0 Change "VP9" to "AV1"
d1a11fb Change "vp8" to "aom"
7b58251 Point to WebM test data
dd1a5c8 Replace "VP8" with "AOM"
ff00fc0 Change "VPX" to "AOM"
01dee0b Change "vp10" to "av1" in source code
cebe6f0 Convert "vpx" to "aom"
17b0567 rename vp10*.mk to av1_*.mk
fe5f8a8 rename files vp10_* to av1_*

Change-Id: I6fc3d18eb11fc171e46140c836ad5339cf6c9419

av1/common/blockd.c

diff --git a/av1/common/blockd.c b/av1/common/blockd.c
index ee95271..b13e562 100644
--- a/av1/common/blockd.c
+++ b/av1/common/blockd.c
@@ -14,8 +14,8 @@
 
 #include "av1/common/blockd.h"
 
-PREDICTION_MODE vp10_left_block_mode(const MODE_INFO *cur_mi,
-                                     const MODE_INFO *left_mi, int b) {
+PREDICTION_MODE av1_left_block_mode(const MODE_INFO *cur_mi,
+                                    const MODE_INFO *left_mi, int b) {
   if (b == 0 || b == 2) {
     if (!left_mi || is_inter_block(&left_mi->mbmi)) return DC_PRED;
 
@@ -26,8 +26,8 @@
   }
 }
 
-PREDICTION_MODE vp10_above_block_mode(const MODE_INFO *cur_mi,
-                                      const MODE_INFO *above_mi, int b) {
+PREDICTION_MODE av1_above_block_mode(const MODE_INFO *cur_mi,
+                                     const MODE_INFO *above_mi, int b) {
   if (b == 0 || b == 1) {
     if (!above_mi || is_inter_block(&above_mi->mbmi)) return DC_PRED;
 
@@ -38,7 +38,7 @@
   }
 }
 
-void vp10_foreach_transformed_block_in_plane(
+void av1_foreach_transformed_block_in_plane(
     const MACROBLOCKD *const xd, BLOCK_SIZE bsize, int plane,
     foreach_transformed_block_visitor visit, void *arg) {
   const struct macroblockd_plane *const pd = &xd->plane[plane];
@@ -81,18 +81,18 @@
   }
 }
 
-void vp10_foreach_transformed_block(const MACROBLOCKD *const xd,
-                                    BLOCK_SIZE bsize,
-                                    foreach_transformed_block_visitor visit,
-                                    void *arg) {
+void av1_foreach_transformed_block(const MACROBLOCKD *const xd,
+                                   BLOCK_SIZE bsize,
+                                   foreach_transformed_block_visitor visit,
+                                   void *arg) {
   int plane;
   for (plane = 0; plane < MAX_MB_PLANE; ++plane)
-    vp10_foreach_transformed_block_in_plane(xd, bsize, plane, visit, arg);
+    av1_foreach_transformed_block_in_plane(xd, bsize, plane, visit, arg);
 }
 
-void vp10_set_contexts(const MACROBLOCKD *xd, struct macroblockd_plane *pd,
-                       BLOCK_SIZE plane_bsize, TX_SIZE tx_size, int has_eob,
-                       int aoff, int loff) {
+void av1_set_contexts(const MACROBLOCKD *xd, struct macroblockd_plane *pd,
+                      BLOCK_SIZE plane_bsize, TX_SIZE tx_size, int has_eob,
+                      int aoff, int loff) {
   ENTROPY_CONTEXT *const a = pd->above_context + aoff;
   ENTROPY_CONTEXT *const l = pd->left_context + loff;
   const int tx_w_in_blocks = num_4x4_blocks_wide_txsize_lookup[tx_size];
@@ -128,7 +128,7 @@
   }
 }
 
-void vp10_setup_block_planes(MACROBLOCKD *xd, int ss_x, int ss_y) {
+void av1_setup_block_planes(MACROBLOCKD *xd, int ss_x, int ss_y) {
   int i;
 
   for (i = 0; i < MAX_MB_PLANE; i++) {
@@ -151,7 +151,7 @@
 
 // Returns whether filter selection is needed for a given
 // intra prediction angle.
-int vp10_is_intra_filter_switchable(int angle) {
+int av1_is_intra_filter_switchable(int angle) {
   assert(angle > 0 && angle < 270);
   if (angle % 45 == 0) return 0;
   if (angle > 90 && angle < 180) {