Rename namespace dawn_wire to dawn::wire.

But keep a namespace alias to avoid breaking project that depend on the
previous namespace name while they get updated.

Bug: dawn:824
Change-Id: I1e99c4d0d2acf7644a225a88d07806d1a64478e6
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/75540
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

src/include/dawn_platform/DawnPlatform.h

@@ -113,6 +113,7 @@ namespace dawn::platform {
 
 }  // namespace dawn::platform
 
+// TODO(dawn:824): Remove once the deprecation period is passed.
 namespace dawn_platform = dawn::platform;
 
 #endif  // DAWNPLATFORM_DAWNPLATFORM_H_

src/include/dawn_wire/Wire.h

@@ -21,7 +21,7 @@
 #include "dawn/webgpu.h"
 #include "dawn_wire/dawn_wire_export.h"
 
-namespace dawn_wire {
+namespace dawn::wire {
 
     class DAWN_WIRE_EXPORT CommandSerializer {
       public:
@@ -71,6 +71,9 @@ namespace dawn_wire {
                                                          const volatile char* deserializeBuffer,
                                                          size_t deserializeBufferSize);
 
-}  // namespace dawn_wire
+}  // namespace dawn::wire
+
+// TODO(dawn:824): Remove once the deprecation period is passed.
+namespace dawn_wire = dawn::wire;
 
 #endif  // DAWNWIRE_WIRE_H_

src/include/dawn_wire/WireClient.h

@@ -21,7 +21,7 @@
 #include <memory>
 #include <vector>
 
-namespace dawn_wire {
+namespace dawn::wire {
 
     namespace client {
         class Client;
@@ -178,6 +178,6 @@ namespace dawn_wire {
         // Backdoor to get the order of the ProcMap for testing
         DAWN_WIRE_EXPORT std::vector<const char*> GetProcMapNamesForTesting();
     }  // namespace client
-}  // namespace dawn_wire
+}  // namespace dawn::wire
 
 #endif  // DAWNWIRE_WIRECLIENT_H_

src/include/dawn_wire/WireServer.h

@@ -21,7 +21,7 @@
 
 struct DawnProcTable;
 
-namespace dawn_wire {
+namespace dawn::wire {
 
     namespace server {
         class Server;
@@ -145,6 +145,6 @@ namespace dawn_wire {
         };
     }  // namespace server
 
-}  // namespace dawn_wire
+}  // namespace dawn::wire
 
 #endif  // DAWNWIRE_WIRESERVER_H_