Use 1/8 of heap size as TotalGpuMemory for low end devices.

Also disabling async uploads if the heap size is less than 128MB as with async uploads the number of tiles grow unbounded without respecting the TotalGpuMemory. epenner and myself will investigate further.

BUG=243703

Review URL: https://chromiumcodereview.appspot.com/16859003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@206946 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 7 insertions, 3 deletions

diff --git a/ui/gl/gl_context_android.cc b/ui/gl/gl_context_android.cc
index 552b055..1fe9416 100644
--- a/ui/gl/gl_context_android.cc
+++ b/ui/gl/gl_context_android.cc
@@ -89,10 +89,12 @@ bool GLContextEGL::GetTotalGpuMemory(size_t* bytes) {
   // end devices, 1/2 of the heap size can be too high, but this
   // correlates well with having a small heap-growth-limit. So for
   // devices with less ram, we factor in the growth limit.
+  // For devices with very limited memory, (e.g. Nexus S) we use
+  // 1/8 of the heap_size.
   //
   // This is the result of the calculation below:
   // Droid DNA 1080P  128MB
-  // Nexus S           56MB
+  // Nexus S           16MB
   // Galaxy Nexus     112MB
   // Nexus 4/10       256MB
   // Xoom              88MB
@@ -103,9 +105,11 @@ bool GLContextEGL::GetTotalGpuMemory(size_t* bytes) {
                              base::SysInfo::DalvikHeapGrowthLimitMB());
     size_t limit = 0;
     if (heap_size >= 350)
-        limit = heap_size / 2;
+      limit = heap_size / 2;
+    else if (heap_size <= 128)
+      limit = heap_size / 8;
     else
-        limit = (heap_size + (heap_growth * 2)) / 4;
+      limit = (heap_size + (heap_growth * 2)) / 4;
     dalvik_limit = limit * 1024 * 1024;
   }
   *bytes = dalvik_limit;