Replace ASSERT with DHCECK_op in platform/heap

third_party/WebKit/Source/platform/heap/PageMemory.cpp

Index: third_party/WebKit/Source/platform/heap/PageMemory.cpp
diff --git a/third_party/WebKit/Source/platform/heap/PageMemory.cpp b/third_party/WebKit/Source/platform/heap/PageMemory.cpp
index 169be5a5bb359c9ea61b2c826f704edfeab547ff..96c5e2acc6342e75d5cc17c774466a086759a2d4 100644
--- a/third_party/WebKit/Source/platform/heap/PageMemory.cpp
+++ b/third_party/WebKit/Source/platform/heap/PageMemory.cpp
@@ -83,14 +83,14 @@ PageMemoryRegion* RegionTree::Lookup(Address address) {
       current = current->right_;
       continue;
     }
-    ASSERT(current->region_->Contains(address));
+    DCHECK(current->region_->Contains(address));
     return current->region_;
   }
   return nullptr;
 }
 
 void RegionTree::Add(PageMemoryRegion* region) {
-  ASSERT(region);
+  DCHECK(region);
   RegionTreeNode* new_tree = new RegionTreeNode(region);
   new_tree->AddTo(&root_);
 }
@@ -98,7 +98,7 @@ void RegionTree::Add(PageMemoryRegion* region) {
 void RegionTreeNode::AddTo(RegionTreeNode** context) {
   Address base = region_->Base();
   for (RegionTreeNode* current = *context; current; current = *context) {
-    ASSERT(!current->region_->Contains(base));
+    DCHECK(!current->region_->Contains(base));
     context =
         (base < current->region_->Base()) ? &current->left_ : &current->right_;
   }
@@ -106,8 +106,8 @@ void RegionTreeNode::AddTo(RegionTreeNode** context) {
 }
 
 void RegionTree::Remove(PageMemoryRegion* region) {
-  ASSERT(region);
-  ASSERT(root_);
+  DCHECK(region);
+  DCHECK(root_);
   Address base = region->Base();
   RegionTreeNode** context = &root_;
   RegionTreeNode* current = root_;
@@ -136,7 +136,7 @@ void RegionTree::Remove(PageMemoryRegion* region) {
 
 PageMemory::PageMemory(PageMemoryRegion* reserved, const MemoryRegion& writable)
     : reserved_(reserved), writable_(writable) {
-  ASSERT(reserved->Contains(writable));
+  DCHECK(reserved->Contains(writable));
 
   // Register the writable area of the memory as part of the LSan root set.
   // Only the writable area is mapped and can contain C++ objects.  Those
@@ -158,7 +158,7 @@ static size_t RoundToOsPageSize(size_t size) {
 }
 
 PageMemory* PageMemory::Allocate(size_t payload_size, RegionTree* region_tree) {
-  ASSERT(payload_size > 0);
+  DCHECK_GT(payload_size, 0u);
 
   // Virtual memory allocation routines operate in OS page sizes.
   // Round up the requested size to nearest os page size.