Revert "WebCrypto: Add SHA-1 support to crypto.subtle.digest()."

public/platform/Platform.h

Index: public/platform/Platform.h
diff --git a/public/platform/Platform.h b/public/platform/Platform.h
index a466e6206cca320c0a8ca7afbbabafce53ba7b50..d00f86f7475e860ef4369767f636140306d707db 100644
--- a/public/platform/Platform.h
+++ b/public/platform/Platform.h
@@ -55,7 +55,6 @@ class WebContentDecryptionModule;
 class WebClipboard;
 class WebCompositorSupport;
 class WebCookieJar;
-class WebCrypto;
 class WebDeviceMotionListener;
 class WebDiscardableMemory;
 class WebFallbackThemeEngine;
@@ -295,7 +294,6 @@ public:
     // A wrapper for tcmalloc's GetHeapProfile()
     virtual WebString getHeapProfile() { return WebString(); }
 
-
     // Message Ports -------------------------------------------------------
 
     // Creates a Message Port Channel. This can be called on any thread.
@@ -535,7 +533,6 @@ public:
     // with |velocity| and already scrolled |cumulativeScroll| pixels.
     virtual WebGestureCurve* createFlingAnimationCurve(int deviceSource, const WebFloatPoint& velocity, const WebSize& cumulativeScroll) { return 0; }
 
-
     // WebRTC ----------------------------------------------------------
 
     // Creates an WebRTCPeerConnectionHandler for RTCPeerConnection.
@@ -552,12 +549,6 @@ public:
     virtual void didStopWorkerRunLoop(const WebWorkerRunLoop&) { }
 
 
-    // WebCrypto ----------------------------------------------------------
-
-    // May return 0.
-    virtual WebCrypto* crypto() { return 0; }
-
-
     // Device Motion / Orientation ----------------------------------------
 
     // Sets a Listener to listen for device motion data updates.