html_viewer: Move webcrypto to a place where html_viewer can use it.

components/webcrypto/platform_crypto.h

Index: components/webcrypto/platform_crypto.h
diff --git a/content/child/webcrypto/platform_crypto.h b/components/webcrypto/platform_crypto.h
similarity index 96%
rename from content/child/webcrypto/platform_crypto.h
rename to components/webcrypto/platform_crypto.h
index 902c13e0db13c8873e588bd3780641df332e95a6..275557e6b2f0dcf6888b2e4e3e9b5feefb6b58c1 100644
--- a/content/child/webcrypto/platform_crypto.h
+++ b/components/webcrypto/platform_crypto.h
@@ -12,7 +12,7 @@
 #include "third_party/WebKit/public/platform/WebCrypto.h"
 
 // The definitions for these methods lives in either nss/ or openssl/
-namespace content {
+namespace components {
 
 namespace webcrypto {
 
@@ -39,6 +39,6 @@ AlgorithmImplementation* CreatePlatformPbkdf2Implementation();
 
 }  // namespace webcrypto
 
-}  // namespace content
+}  // namespace components
 
 #endif  // CONTENT_CHILD_WEBCRYPTO_PLATFORM_CRYPTO_H_