Update DEPS for 5221 branching

Change-Id: Ibd88bd6c7d38c207cf19a434f50bb9cba7aaa5d4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3812900
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/5221@{#1}
Cr-Branched-From: 40e15f1-refs/heads/main@{#1031856}

DEPS

@@ -301,19 +301,19 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.
-  'v8_revision': 'f202f0096401a42bb797602b817efda93d166a86',
+  'v8_revision': 'refs/heads/chromium/5221',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling ANGLE
   # and whatever else without interference from each other.
-  'angle_revision': 'dbfab1595b8a92978e8e5d79cc6dec46f592629d',
+  'angle_revision': 'refs/heads/chromium/5221',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.
   'swiftshader_revision': 'dcaef10ef0ada8ce283bb1ebc555e81869c64c52',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.
-  'pdfium_revision': '5d5c0eb382f3dd409ab49121a6ad8db59f72f9f0',
+  'pdfium_revision': 'refs/heads/chromium/5221',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.
@@ -412,7 +412,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.
-  'dawn_revision': '73ecc66e47dc535a846ecf67bf1f59df18b1e0b5',
+  'dawn_revision': 'refs/heads/chromium/5221',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.
@@ -1621,7 +1621,7 @@ deps = {
   },
 
   'src/third_party/requests/src': {
-      'url': Var('chromium_git') + '/external/github.com/kennethreitz/requests.git' + '@' + 'refs/tags/v2.23.0',
+      'url': Var('chromium_git') + '/external/github.com/kennethreitz/requests.git' + '@' + 'c7e0fc087ceeadb8b4c84a0953a422c474093d6d',
       'condition': 'checkout_android',
   },
 
@@ -1693,7 +1693,7 @@ deps = {
       'dep_type': 'cipd',
   },
 
-  'src/third_party/vulkan-deps': '{chromium_git}/vulkan-deps@fa6a3bcb6169cbeab07cf1bdbd12c34fae669e60',
+  'src/third_party/vulkan-deps': '{chromium_git}/vulkan-deps@refs/heads/chromium/5221',
 
   'src/third_party/vulkan_memory_allocator':
     Var('chromium_git') + '/external/github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator.git' + '@' + 'ebe84bec02c041d28f902da0214bf442743fc907',
@@ -1732,7 +1732,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/gpuweb/cts.git' + '@' + 'ed11c6ba35570aea10ca3fb5245bbee362915f36',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + 'b0a57d8e616213a6b8aa1efdd8681343acf12848',
+    Var('webrtc_git') + '/src.git' + '@' + 'refs/branch-heads/5221',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),
@@ -1805,7 +1805,7 @@ deps = {
     Var('chromium_git') + '/v8/v8.git' + '@' +  Var('v8_revision'),
 
   'src-internal': {
-    'url': 'https://chrome-internal.googlesource.com/chrome/src-internal.git@eb8d8f22bf7e4e8fe878187a6cbebc914827f687',
+    'url': 'https://chrome-internal.googlesource.com/chrome/src-internal.git@refs/heads/chromium/5221',
     'condition': 'checkout_src_internal',
   },