cc: Remove wtf hashmap use from resource provider

cc/resource_provider_unittest.cc

Index: cc/resource_provider_unittest.cc
diff --git a/cc/resource_provider_unittest.cc b/cc/resource_provider_unittest.cc
index ac9176ca3c3a0bdac3882ac5849ac3d7bb3bed1e..ed85ffcf4c529b8790e32eb49377ddccc0cccdba 100644
--- a/cc/resource_provider_unittest.cc
+++ b/cc/resource_provider_unittest.cc
@@ -453,8 +453,8 @@ TEST_P(CCResourceProviderTest, TransferResources)
     EXPECT_EQ(2u, m_resourceProvider->numResources());
     EXPECT_EQ(2u, m_resourceProvider->mailboxCount());
     CCResourceProvider::ResourceIdMap resourceMap = m_resourceProvider->getChildToParentMap(childId);
-    CCResourceProvider::ResourceId mappedId1 = resourceMap.get(id1);
-    CCResourceProvider::ResourceId mappedId2 = resourceMap.get(id2);
+    CCResourceProvider::ResourceId mappedId1 = resourceMap[id1];
+    CCResourceProvider::ResourceId mappedId2 = resourceMap[id2];
     EXPECT_NE(0u, mappedId1);
     EXPECT_NE(0u, mappedId2);
     EXPECT_FALSE(m_resourceProvider->inUseByConsumer(id1));
@@ -568,7 +568,7 @@ TEST_P(CCResourceProviderTest, DeleteTransferredResources)
     {
         // Transfer resources back from the parent to the child.
         CCResourceProvider::ResourceIdMap resourceMap = m_resourceProvider->getChildToParentMap(childId);
-        CCResourceProvider::ResourceId mappedId = resourceMap.get(id);
+        CCResourceProvider::ResourceId mappedId = resourceMap[id];
         EXPECT_NE(0u, mappedId);
         CCResourceProvider::ResourceIdArray resourceIdsToTransfer;
         resourceIdsToTransfer.append(mappedId);