Bug 1318764 - Get rid of GetLookAndFeelCache sync IPC message, and send cache with GetXPCOMProcessAttributes instead. r=billm

MozReview-Commit-ID: 7BzG2WqNYLO

--HG--
extra : rebase_source : a6d2510b63cefe2895172a082d9a4c67c12944f5

dom/ipc/ContentChild.cpp

@@ -922,7 +922,9 @@ ContentChild::InitXPCOM()
                                 &isLangRTL, &haveBidiKeyboards,
                                 &mAvailableDictionaries,
                                 &clipboardCaps, &domainPolicy, &initialData,
-                                &mFontFamilies, &userContentSheetURL);
+                                &mFontFamilies, &userContentSheetURL,
+                                &mLookAndFeelCache);
+
   RecvSetOffline(isOffline);
   RecvSetConnectivity(isConnected);
   RecvSetCaptivePortalState(captivePortalState);

dom/ipc/ContentChild.h

@@ -31,6 +31,7 @@ struct SubstitutionMapping;
 struct OverrideMapping;
 class nsIDomainPolicy;
 class nsIURIClassifierCallback;
+struct LookAndFeelInt;
 
 namespace mozilla {
 class RemoteSpellcheckEngineChild;
@@ -621,6 +622,11 @@ public:
   virtual bool
   DeallocPURLClassifierChild(PURLClassifierChild* aActor) override;
 
+  nsTArray<LookAndFeelInt>&
+  LookAndFeelCache() {
+    return mLookAndFeelCache;
+  }
+
   /**
    * Helper function for protocols that use the GPU process when available.
    * Overrides FatalError to just be a warning when communicating with the
@@ -650,6 +656,8 @@ private:
   // parent process and used to initialize gfx in the child. Currently used
   // only on MacOSX.
   InfallibleTArray<mozilla::dom::FontFamilyListEntry> mFontFamilies;
+  // Temporary storage for nsXPLookAndFeel flags.
+  nsTArray<LookAndFeelInt> mLookAndFeelCache;
 
   /**
    * An ID unique to the process containing our corresponding

dom/ipc/ContentParent.cpp

@@ -2479,7 +2479,8 @@ ContentParent::RecvGetXPCOMProcessAttributes(bool* aIsOffline,
                                              DomainPolicyClone* domainPolicy,
                                              StructuredCloneData* aInitialData,
                                              InfallibleTArray<FontFamilyListEntry>* fontFamilies,
-                                             OptionalURIParams* aUserContentCSSURL)
+                                             OptionalURIParams* aUserContentCSSURL,
+                                             nsTArray<LookAndFeelInt>* aLookAndFeelIntCache)
 {
   nsCOMPtr<nsIIOService> io(do_GetIOService());
   MOZ_ASSERT(io, "No IO service?");
@@ -2544,6 +2545,7 @@ ContentParent::RecvGetXPCOMProcessAttributes(bool* aIsOffline,
 
   // This is only implemented (returns a non-empty list) by MacOSX at present.
   gfxPlatform::GetPlatform()->GetSystemFontFamilyList(fontFamilies);
+  *aLookAndFeelIntCache = LookAndFeel::GetIntCache();
 
   // Content processes have no permission to access profile directory, so we
   // send the file URL instead.
@@ -3235,13 +3237,6 @@ ContentParent::RecvNSSU2FTokenSign(nsTArray<uint8_t>&& aApplication,
   return IPC_OK();
 }
 
-mozilla::ipc::IPCResult
-ContentParent::RecvGetLookAndFeelCache(nsTArray<LookAndFeelInt>* aLookAndFeelIntCache)
-{
-  *aLookAndFeelIntCache = LookAndFeel::GetIntCache();
-  return IPC_OK();
-}
-
 mozilla::ipc::IPCResult
 ContentParent::RecvIsSecureURI(const uint32_t& type,
                                const URIParams& uri,

dom/ipc/ContentParent.h

@@ -682,7 +682,8 @@ private:
                                 DomainPolicyClone* domainPolicy,
                                 StructuredCloneData* initialData,
                                 InfallibleTArray<FontFamilyListEntry>* fontFamilies,
-                                OptionalURIParams* aUserContentSheetURL) override;
+                                OptionalURIParams* aUserContentSheetURL,
+                                nsTArray<LookAndFeelInt>* aLookAndFeelIntCache) override;
 
   virtual bool
   DeallocPJavaScriptParent(mozilla::jsipc::PJavaScriptParent*) override;
@@ -928,8 +929,6 @@ private:
                                                                 const bool& aContentOrNormalChannel,
                                                                 const bool& aAnyChannel) override;
 
-  virtual mozilla::ipc::IPCResult RecvGetLookAndFeelCache(nsTArray<LookAndFeelInt>* aLookAndFeelIntCache) override;
-
   virtual mozilla::ipc::IPCResult RecvKeywordToURI(const nsCString& aKeyword,
                                                    nsString* aProviderName,
                                                    OptionalInputStreamParams* aPostData,

dom/ipc/PContent.ipdl

@@ -667,7 +667,8 @@ parent:
                  DomainPolicyClone domainPolicy,
                  StructuredCloneData initialData,
                  FontFamilyListEntry[] fontFamilies /* used on MacOSX only */,
-                 OptionalURIParams userContentSheetURL);
+                 OptionalURIParams userContentSheetURL,
+                 LookAndFeelInt[] lookAndFeelIntCache);
 
     sync CreateChildProcess(IPCTabContext context,
                             ProcessPriority priority,
@@ -768,9 +769,6 @@ parent:
 
     async AccumulateMixedContentHSTS(URIParams uri, bool active, bool hasHSTSPriming);
 
-    sync GetLookAndFeelCache()
-        returns (LookAndFeelInt[] lookAndFeelIntCache);
-
     nested(inside_cpow) async PHal();
 
     async PHeapSnapshotTempFileHelper();

widget/nsXPLookAndFeel.cpp

@@ -474,9 +474,9 @@ nsXPLookAndFeel::Init()
     mozilla::dom::ContentChild* cc =
       mozilla::dom::ContentChild::GetSingleton();
 
-    nsTArray<LookAndFeelInt> lookAndFeelIntCache;
-    cc->SendGetLookAndFeelCache(&lookAndFeelIntCache);
-    LookAndFeel::SetIntCache(lookAndFeelIntCache);
+    LookAndFeel::SetIntCache(cc->LookAndFeelCache());
+    // This is only ever used once during initialization, and can be cleared now.
+    cc->LookAndFeelCache().Clear();
   }
 }