Move unique name generation and tracking into //content.

third_party/WebKit/public/web/WebFrameClient.h

Index: third_party/WebKit/public/web/WebFrameClient.h
diff --git a/third_party/WebKit/public/web/WebFrameClient.h b/third_party/WebKit/public/web/WebFrameClient.h
index 5bf558bdb55eb59a54a0fdb1fa37d2ecc475dc43..6c1ee8a95ddcb6f1b2df06d861c2cff0b1b2e75f 100644
--- a/third_party/WebKit/public/web/WebFrameClient.h
+++ b/third_party/WebKit/public/web/WebFrameClient.h
@@ -180,7 +180,7 @@ class BLINK_EXPORT WebFrameClient {
   virtual WebLocalFrame* createChildFrame(WebLocalFrame* parent,
                                           WebTreeScopeType,
                                           const WebString& name,
-                                          const WebString& uniqueName,
+                                          const WebString& fallbackName,

[dcheng, 2017/03/01 23:57:26]

Note: I'm 95% sure this isn't actually needed: when creating a child frame, we
already set name to the fallback name. But this is already a pretty large
change, so I'll pursue this in followups.

                                           WebSandboxFlags sandboxFlags,
                                           const WebFrameOwnerProperties&) {
     return nullptr;
@@ -206,8 +206,7 @@ class BLINK_EXPORT WebFrameClient {
   virtual void willCommitProvisionalLoad(WebLocalFrame*) {}
 
   // This frame's name has changed.
-  virtual void didChangeName(const WebString& name,
-                             const WebString& uniqueName) {}
+  virtual void didChangeName(const WebString& name) {}
 
   // This frame has set an insecure request policy.
   virtual void didEnforceInsecureRequestPolicy(WebInsecureRequestPolicy) {}